tmux(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | DEFAULT KEY BINDINGS | COMMAND PARSING AND EXECUTION | PARSING SYNTAX | COMMANDS | CLIENTS AND SESSIONS | WINDOWS AND PANES | KEY BINDINGS | OPTIONS | HOOKS | MOUSE SUPPORT | FORMATS | STYLES | NAMES AND TITLES | GLOBAL AND SESSION ENVIRONMENT | STATUS LINE | BUFFERS | MISCELLANEOUS | EXIT MESSAGES | TERMINFO EXTENSIONS | CONTROL MODE | ENVIRONMENT | FILES | EXAMPLES | SEE ALSO | AUTHORS | COLOPHON

TMUX(1)                  General Commands Manual                 TMUX(1)

NAME         top

       tmux — terminal multiplexer

SYNOPSIS         top

       tmux [-2CDlNuVv] [-c shell-command] [-f file] [-L socket-name]
       [-S socket-path] [-T features] [command [flags]]

DESCRIPTION         top

       is a terminal multiplexer: it enables a number of terminals to be
       created, accessed, and controlled from a single screen.  may be
       detached from a screen and continue running in the background,
       then later reattached.

       When is started, it creates a new session with a single window
       and displays it on screen.  A status line at the bottom of the
       screen shows information on the current session and is used to
       enter interactive commands.

       A session is a single collection of pseudo terminals under the
       management of .  Each session has one or more windows linked to
       it.  A window occupies the entire screen and may be split into
       rectangular panes, each of which is a separate pseudo terminal
       (the pty(4) manual page documents the technical details of pseudo
       terminals).  Any number of instances may connect to the same
       session, and any number of windows may be present in the same
       session.  Once all sessions are killed, exits.

       Each session is persistent and will survive accidental
       disconnection (such as ssh(1) connection timeout) or intentional
       detaching (with the ‘C-b d’ key strokes).  may be reattached
       using:

             $ tmux attach

       In , a session is displayed on screen by a client and all
       sessions are managed by a single server.  The server and each
       client are separate processes which communicate through a socket
       in /tmp.

       The options are as follows:

       -2            Force to assume the terminal supports 256 colours.
                     This is equivalent to -T 256.

       -C            Start in control mode (see the “CONTROL MODE”
                     section).  Given twice (-CC) disables echo.

       -c shell-command
                     Execute shell-command using the default shell.  If
                     necessary, the server will be started to retrieve
                     the default-shell option.  This option is for
                     compatibility with sh(1) when is used as a login
                     shell.

       -D            Do not start the server as a daemon.  This also
                     turns the exit-empty option off.  With -D, command
                     may not be specified.

       -f file       Specify an alternative configuration file.  By
                     default, loads the system configuration file from
                     @SYSCONFDIR@/tmux.conf, if present, then looks for
                     a user configuration file at ~/.tmux.conf,
                     $XDG_CONFIG_HOME/tmux/tmux.conf or
                     ~/.config/tmux/tmux.conf.

                     The configuration file is a set of commands which
                     are executed in sequence when the server is first
                     started.  loads configuration files once when the
                     server process has started.  The source-file
                     command may be used to load a file later.

                     shows any error messages from commands in
                     configuration files in the first session created,
                     and continues to process the rest of the
                     configuration file.

       -L socket-name
                     stores the server socket in a directory under
                     TMUX_TMPDIR or /tmp if it is unset.  The default
                     socket is named default.  This option allows a
                     different socket name to be specified, allowing
                     several independent servers to be run.  Unlike -S a
                     full path is not necessary: the sockets are all
                     created in a directory tmux-UID under the directory
                     given by TMUX_TMPDIR or in /tmp.  The tmux-UID
                     directory is created by and must not be world
                     readable, writable or executable.

                     If the socket is accidentally removed, the SIGUSR1
                     signal may be sent to the server process to
                     recreate it (note that this will fail if any parent
                     directories are missing).

       -l            Behave as a login shell.  This flag currently has
                     no effect and is for compatibility with other
                     shells when using tmux as a login shell.

       -N            Do not start the server even if the command would
                     normally do so (for example new-session or
                     start-server).

       -S socket-path
                     Specify a full alternative path to the server
                     socket.  If -S is specified, the default socket
                     directory is not used and any -L flag is ignored.

       -T features   Set terminal features for the client.  This is a
                     comma-separated list of features.  See the
                     terminal-features option.

       -u            Write UTF-8 output to the terminal even if the
                     first environment variable of LC_ALL, LC_CTYPE, or
                     LANG that is set does not contain "UTF-8" or
                     "UTF8".

       -V            Report the version.

       -v            Request verbose logging.  Log messages will be
                     saved into tmux-client-PID.log and
                     tmux-server-PID.log files in the current directory,
                     where PID is the PID of the server or client
                     process.  If -v is specified twice, an additional
                     tmux-out-PID.log file is generated with a copy of
                     everything writes to the terminal.

                     The SIGUSR2 signal may be sent to the server
                     process to toggle logging between on (as if -v was
                     given) and off.

       command [flags]
                     This specifies one of a set of commands used to
                     control , as described in the following sections.
                     If no commands are specified, the new-session
                     command is assumed.

DEFAULT KEY BINDINGS         top

       may be controlled from an attached client by using a key
       combination of a prefix key, ‘C-b’ (Ctrl-b) by default, followed
       by a command key.

       The default command key bindings are:

             C-b         Send the prefix key (C-b) through to the
                         application.
             C-o         Rotate the panes in the current window
                         forwards.
             C-z         Suspend the client.
             !           Break the current pane out of the window.
             "           Split the current pane into two, top and
                         bottom.
             #           List all paste buffers.
             $           Rename the current session.
             %           Split the current pane into two, left and
                         right.
             &           Kill the current window.
             '           Prompt for a window index to select.
             (           Switch the attached client to the previous
                         session.
             )           Switch the attached client to the next session.
             ,           Rename the current window.
             -           Delete the most recently copied buffer of text.
             .           Prompt for an index to move the current window.
             0 to 9      Select windows 0 to 9.
             :           Enter the command prompt.
             ;           Move to the previously active pane.
             =           Choose which buffer to paste interactively from
                         a list.
             ?           List all key bindings.
             D           Choose a client to detach.
             L           Switch the attached client back to the last
                         session.
             [           Enter copy mode to copy text or view the
                         history.
             ]           Paste the most recently copied buffer of text.
             c           Create a new window.
             d           Detach the current client.
             f           Prompt to search for text in open windows.
             i           Display some information about the current
                         window.
             l           Move to the previously selected window.
             m           Mark the current pane (see select-pane -m).
             M           Clear the marked pane.
             n           Change to the next window.
             o           Select the next pane in the current window.
             p           Change to the previous window.
             q           Briefly display pane indexes.
             r           Force redraw of the attached client.
             s           Select a new session for the attached client
                         interactively.
             t           Show the time.
             w           Choose the current window interactively.
             x           Kill the current pane.
             z           Toggle zoom state of the current pane.
             {           Swap the current pane with the previous pane.
             }           Swap the current pane with the next pane.
             ~           Show previous messages from , if any.
             Page Up     Enter copy mode and scroll one page up.
             Up, Down
             Left, Right
                         Change to the pane above, below, to the left,
                         or to the right of the current pane.
             M-1 to M-5  Arrange panes in one of the five preset
                         layouts: even-horizontal, even-vertical, main-
                         horizontal, main-vertical, or tiled.
             Space       Arrange the current window in the next preset
                         layout.
             M-n         Move to the next window with a bell or activity
                         marker.
             M-o         Rotate the panes in the current window
                         backwards.
             M-p         Move to the previous window with a bell or
                         activity marker.
             C-Up, C-Down
             C-Left, C-Right
                         Resize the current pane in steps of one cell.
             M-Up, M-Down
             M-Left, M-Right
                         Resize the current pane in steps of five cells.

       Key bindings may be changed with the bind-key and unbind-key
       commands.

COMMAND PARSING AND EXECUTION         top

       supports a large number of commands which can be used to control
       its behaviour.  Each command is named and can accept zero or more
       flags and arguments.  They may be bound to a key with the
       bind-key command or run from the shell prompt, a shell script, a
       configuration file or the command prompt.  For example, the same
       set-option command run from the shell prompt, from ~/.tmux.conf
       and bound to a key may look like:

             $ tmux set-option -g status-style bg=cyan

             set-option -g status-style bg=cyan

             bind-key C set-option -g status-style bg=cyan

       Here, the command name is ‘set-option’, ‘-g’ is a flag and
       ‘status-style’ and ‘bg=cyan’ are arguments.

       distinguishes between command parsing and execution.  In order to
       execute a command, needs it to be split up into its name and
       arguments.  This is command parsing.  If a command is run from
       the shell, the shell parses it; from inside or from a
       configuration file, does.  Examples of when parses commands are:

             -   in a configuration file;

             -   typed at the command prompt (see command-prompt);

             -   given to bind-key;

             -   passed as arguments to if-shell or confirm-before.

       To execute commands, each client has a ‘command queue’.  A global
       command queue not attached to any client is used on startup for
       configuration files like ~/.tmux.conf.  Parsed commands added to
       the queue are executed in order.  Some commands, like if-shell
       and confirm-before, parse their argument to create a new command
       which is inserted immediately after themselves.  This means that
       arguments can be parsed twice or more - once when the parent
       command (such as if-shell) is parsed and again when it parses and
       executes its command.  Commands like if-shell, run-shell and
       display-panes stop execution of subsequent commands on the queue
       until something happens - if-shell and run-shell until a shell
       command finishes and display-panes until a key is pressed.  For
       example, the following commands:

             new-session; new-window
             if-shell "true" "split-window"
             kill-session

       Will execute new-session, new-window, if-shell, the shell command
       true(1), split-window and kill-session in that order.

       The “COMMANDS” section lists the commands and their arguments.

PARSING SYNTAX         top

       This section describes the syntax of commands parsed by , for
       example in a configuration file or at the command prompt.  Note
       that when commands are entered into the shell, they are parsed by
       the shell - see for example ksh(1) or csh(1).

       Each command is terminated by a newline or a semicolon (;).
       Commands separated by semicolons together form a ‘command
       sequence’ - if a command in the sequence encounters an error, no
       subsequent commands are executed.

       It is recommended that a semicolon used as a command separator
       should be written as an individual token, for example from sh(1):

             $ tmux neww \; splitw

       Or:

             $ tmux neww ';' splitw

       Or from the tmux command prompt:

             neww ; splitw

       However, a trailing semicolon is also interpreted as a command
       separator, for example in these sh(1) commands:

             $ tmux neww\; splitw

       Or:

             $ tmux 'neww;' splitw

       As in these examples, when running tmux from the shell extra care
       must be taken to properly quote semicolons:

             1.   Semicolons that should be interpreted as a command
                  separator should be escaped according to the shell
                  conventions.  For sh(1) this typically means quoted
                  (such as ‘neww ';' splitw’) or escaped (such as ‘neww
                  \\\\; splitw’).

             2.   Individual semicolons or trailing semicolons that
                  should be interpreted as arguments should be escaped
                  twice: once according to the shell conventions and a
                  second time for ; for example:

                        $ tmux neww 'foo\\;' bar
                        $ tmux neww foo\\\\; bar

             3.   Semicolons that are not individual tokens or trailing
                  another token should only be escaped once according to
                  shell conventions; for example:

                        $ tmux neww 'foo-;-bar'
                        $ tmux neww foo-\\;-bar

       Comments are marked by the unquoted # character - any remaining
       text after a comment is ignored until the end of the line.

       If the last character of a line is \, the line is joined with the
       following line (the \ and the newline are completely removed).
       This is called line continuation and applies both inside and
       outside quoted strings and in comments, but not inside braces.

       Command arguments may be specified as strings surrounded by
       single (') quotes, double quotes (") or braces ({}).  This is
       required when the argument contains any special character.
       Single and double quoted strings cannot span multiple lines
       except with line continuation.  Braces can span multiple lines.

       Outside of quotes and inside double quotes, these replacements
       are performed:

             -   Environment variables preceded by $ are replaced with
                 their value from the global environment (see the
                 “GLOBAL AND SESSION ENVIRONMENT” section).

             -   A leading ~ or ~user is expanded to the home directory
                 of the current or specified user.

             -   \uXXXX or \uXXXXXXXX is replaced by the Unicode
                 codepoint corresponding to the given four or eight
                 digit hexadecimal number.

             -   When preceded (escaped) by a \, the following
                 characters are replaced: \e by the escape character; \r
                 by a carriage return; \n by a newline; and \t by a tab.

             -   \ooo is replaced by a character of the octal value ooo.
                 Three octal digits are required, for example \001.  The
                 largest valid character is \377.

             -   Any other characters preceded by \ are replaced by
                 themselves (that is, the \ is removed) and are not
                 treated as having any special meaning - so for example
                 \; will not mark a command sequence and \$ will not
                 expand an environment variable.

       Braces are parsed as a configuration file (so conditions such as
       ‘%if’ are processed) and then converted into a string.  They are
       designed to avoid the need for additional escaping when passing a
       group of commands as an argument (for example to if-shell).
       These two examples produce an identical command - note that no
       escaping is needed when using {}:

             if-shell true {
                 display -p 'brace-dollar-foo: }$foo'
             }

             if-shell true "display -p 'brace-dollar-foo: }\$foo'"

       Braces may be enclosed inside braces, for example:

             bind x if-shell "true" {
                 if-shell "true" {
                     display "true!"
                 }
             }

       Environment variables may be set by using the syntax
       ‘name=value’, for example ‘HOME=/home/user’.  Variables set
       during parsing are added to the global environment.  A hidden
       variable may be set with ‘%hidden’, for example:

             %hidden MYVAR=42

       Hidden variables are not passed to the environment of processes
       created by tmux.  See the “GLOBAL AND SESSION ENVIRONMENT”
       section.

       Commands may be parsed conditionally by surrounding them with
       ‘%if’, ‘%elif’, ‘%else’ and ‘%endif’.  The argument to ‘%if’ and
       ‘%elif’ is expanded as a format (see “FORMATS”) and if it
       evaluates to false (zero or empty), subsequent text is ignored
       until the closing ‘%elif’, ‘%else’ or ‘%endif’.  For example:

             %if "#{==:#{host},myhost}"
             set -g status-style bg=red
             %elif "#{==:#{host},myotherhost}"
             set -g status-style bg=green
             %else
             set -g status-style bg=blue
             %endif

       Will change the status line to red if running on ‘myhost’, green
       if running on ‘myotherhost’, or blue if running on another host.
       Conditionals may be given on one line, for example:

             %if #{==:#{host},myhost} set -g status-style bg=red %endif

COMMANDS         top

       This section describes the commands supported by .  Most commands
       accept the optional -t (and sometimes -s) argument with one of
       target-client, target-session, target-window, or target-pane.
       These specify the client, session, window or pane which a command
       should affect.

       target-client should be the name of the client, typically the
       pty(4) file to which the client is connected, for example either
       of /dev/ttyp1 or ttyp1 for the client attached to /dev/ttyp1.  If
       no client is specified, attempts to work out the client currently
       in use; if that fails, an error is reported.  Clients may be
       listed with the list-clients command.

       target-session is tried as, in order:

             1.   A session ID prefixed with a $.

             2.   An exact name of a session (as listed by the
                  list-sessions command).

             3.   The start of a session name, for example ‘mysess’
                  would match a session named ‘mysession’.

             4.   An fnmatch(3) pattern which is matched against the
                  session name.

       If the session name is prefixed with an ‘=’, only an exact match
       is accepted (so ‘=mysess’ will only match exactly ‘mysess’, not
       ‘mysession’).

       If a single session is found, it is used as the target session;
       multiple matches produce an error.  If a session is omitted, the
       current session is used if available; if no current session is
       available, the most recently used is chosen.

       target-window (or src-window or dst-window) specifies a window in
       the form session:window.  session follows the same rules as for
       target-session, and window is looked for in order as:

             1.   A special token, listed below.

             2.   A window index, for example ‘mysession:1’ is window 1
                  in session ‘mysession’.

             3.   A window ID, such as @1.

             4.   An exact window name, such as ‘mysession:mywindow’.

             5.   The start of a window name, such as ‘mysession:mywin’.

             6.   As an fnmatch(3) pattern matched against the window
                  name.

       Like sessions, a ‘=’ prefix will do an exact match only.  An
       empty window name specifies the next unused index if appropriate
       (for example the new-window and link-window commands) otherwise
       the current window in session is chosen.

       The following special tokens are available to indicate particular
       windows.  Each has a single-character alternative form.

       Token              Meaning
       {start}       ^    The lowest-numbered window
       {end}         $    The highest-numbered window
       {last}        !    The last (previously current) window
       {next}        +    The next window by number
       {previous}    -    The previous window by number

       target-pane (or src-pane or dst-pane) may be a pane ID or takes a
       similar form to target-window but with the optional addition of a
       period followed by a pane index or pane ID, for example:
       ‘mysession:mywindow.1’.  If the pane index is omitted, the
       currently active pane in the specified window is used.  The
       following special tokens are available for the pane index:

       Token                  Meaning
       {last}            !    The last (previously active) pane
       {next}            +    The next pane by number
       {previous}        -    The previous pane by number
       {top}                  The top pane
       {bottom}               The bottom pane
       {left}                 The leftmost pane
       {right}                The rightmost pane
       {top-left}             The top-left pane
       {top-right}            The top-right pane
       {bottom-left}          The bottom-left pane
       {bottom-right}         The bottom-right pane
       {up-of}                The pane above the active pane
       {down-of}              The pane below the active pane
       {left-of}              The pane to the left of the active pane
       {right-of}             The pane to the right of the active pane

       The tokens ‘+’ and ‘-’ may be followed by an offset, for example:

             select-window -t:+2

       In addition, target-session, target-window or target-pane may
       consist entirely of the token ‘{mouse}’ (alternative form ‘=’) to
       specify the session, window or pane where the most recent mouse
       event occurred (see the “MOUSE SUPPORT” section) or ‘{marked}’
       (alternative form ‘~’) to specify the marked pane (see
       select-pane -m).

       Sessions, window and panes are each numbered with a unique ID;
       session IDs are prefixed with a ‘$’, windows with a ‘@’, and
       panes with a ‘%’.  These are unique and are unchanged for the
       life of the session, window or pane in the server.  The pane ID
       is passed to the child process of the pane in the TMUX_PANE
       environment variable.  IDs may be displayed using the
       ‘session_id’, ‘window_id’, or ‘pane_id’ formats (see the
       “FORMATS” section) and the display-message, list-sessions,
       list-windows or list-panes commands.

       shell-command arguments are sh(1) commands.  This may be a single
       argument passed to the shell, for example:

             new-window 'vi ~/.tmux.conf'

       Will run:

             /bin/sh -c 'vi ~/.tmux.conf'

       Additionally, the new-window, new-session, split-window,
       respawn-window and respawn-pane commands allow shell-command to
       be given as multiple arguments and executed directly (without ‘sh
       -c’).  This can avoid issues with shell quoting.  For example:

             $ tmux new-window vi ~/.tmux.conf

       Will run vi(1) directly without invoking the shell.

       command [argument ...] refers to a command, either passed with
       the command and arguments separately, for example:

             bind-key F1 set-option status off

       Or passed as a single string argument in .tmux.conf, for example:

             bind-key F1 { set-option status off }

       Example commands include:

             refresh-client -t/dev/ttyp2

             rename-session -tfirst newname

             set-option -wt:0 monitor-activity on

             new-window ; split-window -d

             bind-key R source-file ~/.tmux.conf \; \
                     display-message "source-file done"

       Or from sh(1):

             $ tmux kill-window -t :1

             $ tmux new-window \; split-window -d

             $ tmux new-session -d 'vi ~/.tmux.conf' \; split-window -d \; attach

CLIENTS AND SESSIONS         top

       The server manages clients, sessions, windows and panes.  Clients
       are attached to sessions to interact with them, either when they
       are created with the new-session command, or later with the
       attach-session command.  Each session has one or more windows
       linked into it.  Windows may be linked to multiple sessions and
       are made up of one or more panes, each of which contains a pseudo
       terminal.  Commands for creating, linking and otherwise
       manipulating windows are covered in the “WINDOWS AND PANES”
       section.

       The following commands are available to manage clients and
       sessions:

       attach-session [-dErx] [-c working-directory] [-f flags] [-t
               target-session]
                     (alias: attach)
               If run from outside , create a new client in the current
               terminal and attach it to target-session.  If used from
               inside, switch the current client.  If -d is specified,
               any other clients attached to the session are detached.
               If -x is given, send SIGHUP to the parent process of the
               client as well as detaching the client, typically causing
               it to exit.  -f sets a comma-separated list of client
               flags.  The flags are:

               active-pane
                       the client has an independent active pane

               ignore-size
                       the client does not affect the size of other
                       clients

               no-output
                       the client does not receive pane output in
                       control mode

               pause-after=seconds
                       output is paused once the pane is seconds behind
                       in control mode

               read-only
                       the client is read-only

               wait-exit
                       wait for an empty line input before exiting in
                       control mode

               A leading ‘!’ turns a flag off if the client is already
               attached.  -r is an alias for -f read-only,ignore-size.
               When a client is read-only, only keys bound to the
               detach-client or switch-client commands have any effect.
               A client with the active-pane flag allows the active pane
               to be selected independently of the window's active pane
               used by clients without the flag.  This only affects the
               cursor position and commands issued from the client;
               other features such as hooks and styles continue to use
               the window's active pane.

               If no server is started, attach-session will attempt to
               start it; this will fail unless sessions are created in
               the configuration file.

               The target-session rules for attach-session are slightly
               adjusted: if needs to select the most recently used
               session, it will prefer the most recently used unattached
               session.

               -c will set the session working directory (used for new
               windows) to working-directory.

               If -E is used, the update-environment option will not be
               applied.

       detach-client [-aP] [-E shell-command] [-s target-session] [-t
               target-client]
                     (alias: detach)
               Detach the current client if bound to a key, the client
               specified with -t, or all clients currently attached to
               the session specified by -s.  The -a option kills all but
               the client given with -t.  If -P is given, send SIGHUP to
               the parent process of the client, typically causing it to
               exit.  With -E, run shell-command to replace the client.

       has-session [-t target-session]
                     (alias: has)
               Report an error and exit with 1 if the specified session
               does not exist.  If it does exist, exit with 0.

       kill-server
               Kill the server and clients and destroy all sessions.

       kill-session [-aC] [-t target-session]
               Destroy the given session, closing any windows linked to
               it and no other sessions, and detaching all clients
               attached to it.  If -a is given, all sessions but the
               specified one is killed.  The -C flag clears alerts
               (bell, activity, or silence) in all windows linked to the
               session.

       list-clients [-F format] [-f filter] [-t target-session]
                     (alias: lsc)
               List all clients attached to the server.  -F specifies
               the format of each line and -f a filter.  Only clients
               for which the filter is true are shown.  See the
               “FORMATS” section.  If target-session is specified, list
               only clients connected to that session.

       list-commands [-F format] [command]
                     (alias: lscm)
               List the syntax of command or - if omitted - of all
               commands supported by .

       list-sessions [-F format] [-f filter]
                     (alias: ls)
               List all sessions managed by the server.  -F specifies
               the format of each line and -f a filter.  Only sessions
               for which the filter is true are shown.  See the
               “FORMATS” section.

       lock-client [-t target-client]
                     (alias: lockc)
               Lock target-client, see the lock-server command.

       lock-session [-t target-session]
                     (alias: locks)
               Lock all clients attached to target-session.

       new-session [-AdDEPX] [-c start-directory] [-e environment] [-f
               flags] [-F format] [-n window-name] [-s session-name] [-t
               group-name] [-x width] [-y height] [shell-command]
                     (alias: new)
               Create a new session with name session-name.

               The new session is attached to the current terminal
               unless -d is given.  window-name and shell-command are
               the name of and shell command to execute in the initial
               window.  With -d, the initial size comes from the global
               default-size option; -x and -y can be used to specify a
               different size.  ‘-’ uses the size of the current client
               if any.  If -x or -y is given, the default-size option is
               set for the session.  -f sets a comma-separated list of
               client flags (see attach-session).

               If run from a terminal, any termios(4) special characters
               are saved and used for new windows in the new session.

               The -A flag makes new-session behave like attach-session
               if session-name already exists; if -A is given, -D
               behaves like -d to attach-session, and -X behaves like -x
               to attach-session.

               If -t is given, it specifies a session group.  Sessions
               in the same group share the same set of windows - new
               windows are linked to all sessions in the group and any
               windows closed removed from all sessions.  The current
               and previous window and any session options remain
               independent and any session in a group may be killed
               without affecting the others.  The group-name argument
               may be:

               1.      the name of an existing group, in which case the
                       new session is added to that group;

               2.      the name of an existing session - the new session
                       is added to the same group as that session,
                       creating a new group if necessary;

               3.      the name for a new group containing only the new
                       session.

               -n and shell-command are invalid if -t is used.

               The -P option prints information about the new session
               after it has been created.  By default, it uses the
               format ‘#{session_name}:’ but a different format may be
               specified with -F.

               If -E is used, the update-environment option will not be
               applied.  -e takes the form ‘VARIABLE=value’ and sets an
               environment variable for the newly created session; it
               may be specified multiple times.

       refresh-client [-cDLRSU] [-A pane:state] [-B name:what:format]
               [-C size] [-f flags] [-l [target-pane]] [-t
               target-client] [adjustment]
                     (alias: refresh)
               Refresh the current client if bound to a key, or a single
               client if one is given with -t.  If -S is specified, only
               update the client's status line.

               The -U, -D, -L -R, and -c flags allow the visible portion
               of a window which is larger than the client to be
               changed.  -U moves the visible part up by adjustment rows
               and -D down, -L left by adjustment columns and -R right.
               -c returns to tracking the cursor automatically.  If
               adjustment is omitted, 1 is used.  Note that the visible
               position is a property of the client not of the window,
               changing the current window in the attached session will
               reset it.

               -C sets the width and height of a control mode client or
               of a window for a control mode client, size must be one
               of ‘widthxheight’ or ‘window ID:widthxheight’, for
               example ‘80x24’ or ‘@0:80x24’.  -A allows a control mode
               client to trigger actions on a pane.  The argument is a
               pane ID (with leading ‘%’), a colon, then one of ‘on’,
               ‘off’, ‘continue’ or ‘pause’.  If ‘off’, will not send
               output from the pane to the client and if all clients
               have turned the pane off, will stop reading from the
               pane.  If ‘continue’, will return to sending output to
               the pane if it was paused (manually or with the
               pause-after flag).  If ‘pause’, will pause the pane.  -A
               may be given multiple times for different panes.

               -B sets a subscription to a format for a control mode
               client.  The argument is split into three items by
               colons: name is a name for the subscription; what is a
               type of item to subscribe to; format is the format.
               After a subscription is added, changes to the format are
               reported with the %subscription-changed notification, at
               most once a second.  If only the name is given, the
               subscription is removed.  what may be empty to check the
               format only for the attached session, or one of: a pane
               ID such as ‘%0’; ‘%*’ for all panes in the attached
               session; a window ID such as ‘@0’; or ‘@*’ for all
               windows in the attached session.

               -f sets a comma-separated list of client flags, see
               attach-session.

               -l requests the clipboard from the client using the
               xterm(1) escape sequence.  If target-pane is given, the
               clipboard is sent (in encoded form), otherwise it is
               stored in a new paste buffer.

               -L, -R, -U and -D move the visible portion of the window
               left, right, up or down by adjustment, if the window is
               larger than the client.  -c resets so that the position
               follows the cursor.  See the window-size option.

       rename-session [-t target-session] new-name
                     (alias: rename)
               Rename the session to new-name.

       server-access [-adlrw] [user]
               Change the access or read/write permission of user.  The
               user running the server (its owner) and the root user
               cannot be changed and are always permitted access.

               -a and -d are used to give or revoke access for the
               specified user.  If the user is already attached, the -d
               flag causes their clients to be detached.

               -r and -w change the permissions for user: -r makes their
               clients read-only and -w writable.  -l lists current
               access permissions.

               By default, the access list is empty and creates sockets
               with file system permissions preventing access by any
               user other than the owner (and root).  These permissions
               must be changed manually.  Great care should be taken not
               to allow access to untrusted users even read-only.

       show-messages [-JT] [-t target-client]
                     (alias: showmsgs)
               Show server messages or information.  Messages are
               stored, up to a maximum of the limit set by the
               message-limit server option.  -J and -T show debugging
               information about jobs and terminals.

       source-file [-Fnqv] [-t target-pane] path ...
                     (alias: source)
               Execute commands from one or more files specified by path
               (which may be glob(7) patterns).  If -F is present, then
               path is expanded as a format.  If -q is given, no error
               will be returned if path does not exist.  With -n, the
               file is parsed but no commands are executed.  -v shows
               the parsed commands and line numbers if possible.

       start-server
                     (alias: start)
               Start the server, if not already running, without
               creating any sessions.

               Note that as by default the server will exit with no
               sessions, this is only useful if a session is created in
               ~/.tmux.conf, exit-empty is turned off, or another
               command is run as part of the same command sequence.  For
               example:

                     $ tmux start \; show -g

       suspend-client [-t target-client]
                     (alias: suspendc)
               Suspend a client by sending SIGTSTP (tty stop).

       switch-client [-ElnprZ] [-c target-client] [-t target-session]
               [-T key-table]
                     (alias: switchc)
               Switch the current session for client target-client to
               target-session.  As a special case, -t may refer to a
               pane (a target that contains ‘:’, ‘.’ or ‘%’), to change
               session, window and pane.  In that case, -Z keeps the
               window zoomed if it was zoomed.  If -l, -n or -p is used,
               the client is moved to the last, next or previous session
               respectively.  -r toggles the client read-only and
               ignore-size flags (see the attach-session command).

               If -E is used, update-environment option will not be
               applied.

               -T sets the client's key table; the next key from the
               client will be interpreted from key-table.  This may be
               used to configure multiple prefix keys, or to bind
               commands to sequences of keys.  For example, to make
               typing ‘abc’ run the list-keys command:

                     bind-key -Ttable2 c list-keys
                     bind-key -Ttable1 b switch-client -Ttable2
                     bind-key -Troot   a switch-client -Ttable1

WINDOWS AND PANES         top

       Each window displayed by may be split into one or more panes;
       each pane takes up a certain area of the display and is a
       separate terminal.  A window may be split into panes using the
       split-window command.  Windows may be split horizontally (with
       the -h flag) or vertically.  Panes may be resized with the
       resize-pane command (bound to ‘C-Up’, ‘C-Down’ ‘C-Left’ and
       ‘C-Right’ by default), the current pane may be changed with the
       select-pane command and the rotate-window and swap-pane commands
       may be used to swap panes without changing their position.  Panes
       are numbered beginning from zero in the order they are created.

       By default, a pane permits direct access to the terminal
       contained in the pane.  A pane may also be put into one of
       several modes:

             -   Copy mode, which permits a section of a window or its
                 history to be copied to a paste buffer for later
                 insertion into another window.  This mode is entered
                 with the copy-mode command, bound to ‘[’ by default.
                 Copied text can be pasted with the paste-buffer
                 command, bound to ‘]’.

             -   View mode, which is like copy mode but is entered when
                 a command that produces output, such as list-keys, is
                 executed from a key binding.

             -   Choose mode, which allows an item to be chosen from a
                 list.  This may be a client, a session or window or
                 pane, or a buffer.  This mode is entered with the
                 choose-buffer, choose-client and choose-tree commands.

       In copy mode an indicator is displayed in the top-right corner of
       the pane with the current position and the number of lines in the
       history.

       Commands are sent to copy mode using the -X flag to the send-keys
       command.  When a key is pressed, copy mode automatically uses one
       of two key tables, depending on the mode-keys option: copy-mode
       for emacs, or copy-mode-vi for vi.  Key tables may be viewed with
       the list-keys command.

       The following commands are supported in copy mode:

       append-selection
               Append the selection to the top paste buffer.

       append-selection-and-cancel (vi: A)
               Append the selection to the top paste buffer and exit
               copy mode.

       back-to-indentation (vi: ^) (emacs: M-m)
               Move the cursor back to the indentation.

       begin-selection (vi: Space) (emacs: C-Space)
               Begin selection.

       bottom-line (vi: L)
               Move to the bottom line.

       cancel (vi: q) (emacs: Escape)
               Exit copy mode.

       clear-selection (vi: Escape) (emacs: C-g)
               Clear the current selection.

       copy-end-of-line [prefix]
               Copy from the cursor position to the end of the line.
               prefix is used to name the new paste buffer.

       copy-end-of-line-and-cancel [prefix]
               Copy from the cursor position and exit copy mode.

       copy-line [prefix]
               Copy the entire line.

       copy-line-and-cancel [prefix]
               Copy the entire line and exit copy mode.

       copy-selection [prefix]
               Copies the current selection.

       copy-selection-and-cancel [prefix] (vi: Enter) (emacs: M-w)
               Copy the current selection and exit copy mode.

       cursor-down (vi: j) (emacs: Down)
               Move the cursor down.

       cursor-left (vi: h) (emacs: Left)
               Move the cursor left.

       cursor-right (vi: l) (emacs: Right)
               Move the cursor right.

       cursor-up (vi: k) (emacs: Up)
               Move the cursor up.

       end-of-line (vi: $) (emacs: C-e)
               Move the cursor to the end of the line.

       goto-line line (vi: :) (emacs: g)
               Move the cursor to a specific line.

       history-bottom (vi: G) (emacs: M->)
               Scroll to the bottom of the history.

       history-top (vi: g) (emacs: M-<)
               Scroll to the top of the history.

       jump-again (vi: ;) (emacs: ;)
               Repeat the last jump.

       jump-backward to (vi: F) (emacs: F)
               Jump backwards to the specified text.

       jump-forward to (vi: f) (emacs: f)
               Jump forward to the specified text.

       jump-to-mark (vi: M-x) (emacs: M-x)
               Jump to the last mark.

       middle-line (vi: M) (emacs: M-r)
               Move to the middle line.

       next-matching-bracket (vi: %) (emacs: M-C-f)
               Move to the next matching bracket.

       next-paragraph (vi: }) (emacs: M-})
               Move to the next paragraph.

       next-prompt [-o]
               Move to the next prompt.

       next-word (vi: w)
               Move to the next word.

       page-down (vi: C-f) (emacs: PageDown)
               Scroll down by one page.

       page-up (vi: C-b) (emacs: PageUp)
               Scroll up by one page.

       previous-matching-bracket (emacs: M-C-b)
               Move to the previous matching bracket.

       previous-paragraph (vi: {) (emacs: M-{)
               Move to the previous paragraph.

       previous-prompt [-o]
               Move to the previous prompt.

       previous-word (vi: b) (emacs: M-b)
               Move to the previous word.

       rectangle-toggle (vi: v) (emacs: R)
               Toggle rectangle selection mode.

       refresh-from-pane (vi: r) (emacs: r)
               Refresh the content from the pane.

       search-again (vi: n) (emacs: n)
               Repeat the last search.

       search-backward text (vi: ?)
               Search backwards for the specified text.

       search-forward text (vi: /)
               Search forward for the specified text.

       select-line (vi: V)
               Select the current line.

       select-word
               Select the current word.

       start-of-line (vi: 0) (emacs: C-a)
               Move the cursor to the start of the line.

       top-line (vi: H) (emacs: M-R)
               Move to the top line.

       The search commands come in several varieties: ‘search-forward’
       and ‘search-backward’ search for a regular expression; the
       ‘-text’ variants search for a plain text string rather than a
       regular expression; ‘-incremental’ perform an incremental search
       and expect to be used with the -i flag to the command-prompt
       command.  ‘search-again’ repeats the last search and
       ‘search-reverse’ does the same but reverses the direction
       (forward becomes backward and backward becomes forward).

       The ‘next-prompt’ and ‘previous-prompt’ move between shell
       prompts, but require the shell to emit an escape sequence
       (\033]133;A\033\\) to tell where the prompts are located; if the
       shell does not do this, these commands will do nothing.  The -o
       flag jumps to the beginning of the command output instead of the
       shell prompt.

       Copy commands may take an optional buffer prefix argument which
       is used to generate the buffer name (the default is ‘buffer’ so
       buffers are named ‘buffer0’, ‘buffer1’ and so on).  Pipe commands
       take a command argument which is the command to which the
       selected text is piped.  ‘copy-pipe’ variants also copy the
       selection.  The ‘-and-cancel’ variants of some commands exit copy
       mode after they have completed (for copy commands) or when the
       cursor reaches the bottom (for scrolling commands).  ‘-no-clear’
       variants do not clear the selection.

       The next and previous word keys skip over whitespace and treat
       consecutive runs of either word separators or other letters as
       words.  Word separators can be customized with the
       word-separators session option.  Next word moves to the start of
       the next word, next word end to the end of the next word and
       previous word to the start of the previous word.  The three next
       and previous space keys work similarly but use a space alone as
       the word separator.  Setting word-separators to the empty string
       makes next/previous word equivalent to next/previous space.

       The jump commands enable quick movement within a line.  For
       instance, typing ‘f’ followed by ‘/’ will move the cursor to the
       next ‘/’ character on the current line.  A ‘;’ will then jump to
       the next occurrence.

       Commands in copy mode may be prefaced by an optional repeat
       count.  With vi key bindings, a prefix is entered using the
       number keys; with emacs, the Alt (meta) key and a number begins
       prefix entry.

       The synopsis for the copy-mode command is:

       copy-mode [-eHMqu] [-s src-pane] [-t target-pane]
               Enter copy mode.  The -u option scrolls one page up.  -M
               begins a mouse drag (only valid if bound to a mouse key
               binding, see “MOUSE SUPPORT”).  -H hides the position
               indicator in the top right.  -q cancels copy mode and any
               other modes.  -s copies from src-pane instead of
               target-pane.

               -e specifies that scrolling to the bottom of the history
               (to the visible screen) should exit copy mode.  While in
               copy mode, pressing a key other than those used for
               scrolling will disable this behaviour.  This is intended
               to allow fast scrolling through a pane's history, for
               example with:

                     bind PageUp copy-mode -eu

       A number of preset arrangements of panes are available, these are
       called layouts.  These may be selected with the select-layout
       command or cycled with next-layout (bound to ‘Space’ by default);
       once a layout is chosen, panes within it may be moved and resized
       as normal.

       The following layouts are supported:

       even-horizontal
               Panes are spread out evenly from left to right across the
               window.

       even-vertical
               Panes are spread evenly from top to bottom.

       main-horizontal
               A large (main) pane is shown at the top of the window and
               the remaining panes are spread from left to right in the
               leftover space at the bottom.  Use the main-pane-height
               window option to specify the height of the top pane.

       main-vertical
               Similar to main-horizontal but the large pane is placed
               on the left and the others spread from top to bottom
               along the right.  See the main-pane-width window option.

       tiled   Panes are spread out as evenly as possible over the
               window in both rows and columns.

       In addition, select-layout may be used to apply a previously used
       layout - the list-windows command displays the layout of each
       window in a form suitable for use with select-layout.  For
       example:

             $ tmux list-windows
             0: ksh [159x48]
                 layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0}
             $ tmux select-layout 'bb62,159x48,0,0{79x48,0,0,79x48,80,0}'

       automatically adjusts the size of the layout for the current
       window size.  Note that a layout cannot be applied to a window
       with more panes than that from which the layout was originally
       defined.

       Commands related to windows and panes are as follows:

       break-pane [-abdP] [-F format] [-n window-name] [-s src-pane] [-t
               dst-window]
                     (alias: breakp)
               Break src-pane off from its containing window to make it
               the only pane in dst-window.  With -a or -b, the window
               is moved to the next index after or before (existing
               windows are moved if necessary).  If -d is given, the new
               window does not become the current window.  The -P option
               prints information about the new window after it has been
               created.  By default, it uses the format
               ‘#{session_name}:#{window_index}.#{pane_index}’ but a
               different format may be specified with -F.

       capture-pane [-aAepPqCJN] [-b buffer-name] [-E end-line] [-S
               start-line] [-t target-pane]
                     (alias: capturep)
               Capture the contents of a pane.  If -p is given, the
               output goes to stdout, otherwise to the buffer specified
               with -b or a new buffer if omitted.  If -a is given, the
               alternate screen is used, and the history is not
               accessible.  If no alternate screen exists, an error will
               be returned unless -q is given.  If -e is given, the
               output includes escape sequences for text and background
               attributes.  -C also escapes non-printable characters as
               octal \xxx.  -T ignores trailing positions that do not
               contain a character.  -N preserves trailing spaces at
               each line's end and -J preserves trailing spaces and
               joins any wrapped lines; -J implies -T.  -P captures only
               any output that the pane has received that is the
               beginning of an as-yet incomplete escape sequence.

               -S and -E specify the starting and ending line numbers,
               zero is the first line of the visible pane and negative
               numbers are lines in the history.  ‘-’ to -S is the start
               of the history and to -E the end of the visible pane.
               The default is to capture only the visible contents of
               the pane.

       choose-client [-NrZ] [-F format] [-f filter] [-K key-format] [-O
               sort-order] [-t target-pane] [template]
               Put a pane into client mode, allowing a client to be
               selected interactively from a list.  Each client is shown
               on one line.  A shortcut key is shown on the left in
               brackets allowing for immediate choice, or the list may
               be navigated and an item chosen or otherwise manipulated
               using the keys below.  -Z zooms the pane.  The following
               keys may be used in client mode:

                     Key    Function
                     Enter  Choose selected client
                     Up     Select previous client
                     Down   Select next client
                     C-s    Search by name
                     n      Repeat last search
                     t      Toggle if client is tagged
                     T      Tag no clients
                     C-t    Tag all clients
                     d      Detach selected client
                     D      Detach tagged clients
                     x      Detach and HUP selected client
                     X      Detach and HUP tagged clients
                     z      Suspend selected client
                     Z      Suspend tagged clients
                     f      Enter a format to filter items
                     O      Change sort field
                     r      Reverse sort order
                     v      Toggle preview
                     q      Exit mode

               After a client is chosen, ‘%%’ is replaced by the client
               name in template and the result executed as a command.
               If template is not given, "detach-client -t '%%'" is
               used.

               -O specifies the initial sort field: one of ‘name’,
               ‘size’, ‘creation’ (time), or ‘activity’ (time).  -r
               reverses the sort order.  -f specifies an initial filter:
               the filter is a format - if it evaluates to zero, the
               item in the list is not shown, otherwise it is shown.  If
               a filter would lead to an empty list, it is ignored.  -F
               specifies the format for each item in the list and -K a
               format for each shortcut key; both are evaluated once for
               each line.  -N starts without the preview.  This command
               works only if at least one client is attached.

       choose-tree [-GNrswZ] [-F format] [-f filter] [-K key-format] [-O
               sort-order] [-t target-pane] [template]
               Put a pane into tree mode, where a session, window or
               pane may be chosen interactively from a tree.  Each
               session, window or pane is shown on one line.  A shortcut
               key is shown on the left in brackets allowing for
               immediate choice, or the tree may be navigated and an
               item chosen or otherwise manipulated using the keys
               below.  -s starts with sessions collapsed and -w with
               windows collapsed.  -Z zooms the pane.  The following
               keys may be used in tree mode:

                     Key    Function
                     Enter  Choose selected item
                     Up     Select previous item
                     Down   Select next item
                     +      Expand selected item
                     -      Collapse selected item
                     M-+    Expand all items
                     M--    Collapse all items
                     x      Kill selected item
                     X      Kill tagged items
                     <      Scroll list of previews left
                     >      Scroll list of previews right
                     C-s    Search by name
                     m      Set the marked pane
                     M      Clear the marked pane
                     n      Repeat last search
                     t      Toggle if item is tagged
                     T      Tag no items
                     C-t    Tag all items
                     :      Run a command for each tagged item
                     f      Enter a format to filter items
                     H      Jump to the starting pane
                     O      Change sort field
                     r      Reverse sort order
                     v      Toggle preview
                     q      Exit mode

               After a session, window or pane is chosen, the first
               instance of ‘%%’ and all instances of ‘%1’ are replaced
               by the target in template and the result executed as a
               command.  If template is not given, "switch-client -t
               '%%'" is used.

               -O specifies the initial sort field: one of ‘index’,
               ‘name’, or ‘time’ (activity).  -r reverses the sort
               order.  -f specifies an initial filter: the filter is a
               format - if it evaluates to zero, the item in the list is
               not shown, otherwise it is shown.  If a filter would lead
               to an empty list, it is ignored.  -F specifies the format
               for each item in the tree and -K a format for each
               shortcut key; both are evaluated once for each line.  -N
               starts without the preview.  -G includes all sessions in
               any session groups in the tree rather than only the
               first.  This command works only if at least one client is
               attached.

       customize-mode [-NZ] [-F format] [-f filter] [-t target-pane]
               [template]
               Put a pane into customize mode, where options and key
               bindings may be browsed and modified from a list.  Option
               values in the list are shown for the active pane in the
               current window.  -Z zooms the pane.  The following keys
               may be used in customize mode:

                     Key    Function
                     Enter  Set pane, window, session or global option
                                        value
                     Up     Select previous item
                     Down   Select next item
                     +      Expand selected item
                     -      Collapse selected item
                     M-+    Expand all items
                     M--    Collapse all items
                     s      Set option value or key attribute
                     S      Set global option value
                     w      Set window option value, if option is for
                                        pane and window
                     d      Set an option or key to the default
                     D      Set tagged options and tagged keys to the
                                        default
                     u      Unset an option (set to default value if
                                        global) or unbind a key
                     U      Unset tagged options and unbind tagged keys
                     C-s    Search by name
                     n      Repeat last search
                     t      Toggle if item is tagged
                     T      Tag no items
                     C-t    Tag all items
                     f      Enter a format to filter items
                     v      Toggle option information
                     q      Exit mode

               -f specifies an initial filter: the filter is a format -
               if it evaluates to zero, the item in the list is not
               shown, otherwise it is shown.  If a filter would lead to
               an empty list, it is ignored.  -F specifies the format
               for each item in the tree.  -N starts without the option
               information.  This command works only if at least one
               client is attached.

       display-panes [-bN] [-d duration] [-t target-client] [template]
                     (alias: displayp)
               Display a visible indicator of each pane shown by
               target-client.  See the display-panes-colour and
               display-panes-active-colour session options.  The
               indicator is closed when a key is pressed (unless -N is
               given) or duration milliseconds have passed.  If -d is
               not given, display-panes-time is used.  A duration of
               zero means the indicator stays until a key is pressed.
               While the indicator is on screen, a pane may be chosen
               with the ‘0’ to ‘9’ keys, which will cause template to be
               executed as a command with ‘%%’ substituted by the pane
               ID.  The default template is "select-pane -t '%%'".  With
               -b, other commands are not blocked from running until the
               indicator is closed.

       find-window [-iCNrTZ] [-t target-pane] match-string
                     (alias: findw)
               Search for a fnmatch(3) pattern or, with -r, regular
               expression match-string in window names, titles, and
               visible content (but not history).  The flags control
               matching behavior: -C matches only visible window
               contents, -N matches only the window name and -T matches
               only the window title.  -i makes the search ignore case.
               The default is -CNT.  -Z zooms the pane.

               This command works only if at least one client is
               attached.

       join-pane [-bdfhv] [-l size] [-s src-pane] [-t dst-pane]
                     (alias: joinp)
               Like split-window, but instead of splitting dst-pane and
               creating a new pane, split it and move src-pane into the
               space.  This can be used to reverse break-pane.  The -b
               option causes src-pane to be joined to left of or above
               dst-pane.

               If -s is omitted and a marked pane is present (see
               select-pane -m), the marked pane is used rather than the
               current pane.

       kill-pane [-a] [-t target-pane]
                     (alias: killp)
               Destroy the given pane.  If no panes remain in the
               containing window, it is also destroyed.  The -a option
               kills all but the pane given with -t.

       kill-window [-a] [-t target-window]
                     (alias: killw)
               Kill the current window or the window at target-window,
               removing it from any sessions to which it is linked.  The
               -a option kills all but the window given with -t.

       last-pane [-deZ] [-t target-window]
                     (alias: lastp)
               Select the last (previously selected) pane.  -Z keeps the
               window zoomed if it was zoomed.  -e enables or -d
               disables input to the pane.

       last-window [-t target-session]
                     (alias: last)
               Select the last (previously selected) window.  If no
               target-session is specified, select the last window of
               the current session.

       link-window [-abdk] [-s src-window] [-t dst-window]
                     (alias: linkw)
               Link the window at src-window to the specified
               dst-window.  If dst-window is specified and no such
               window exists, the src-window is linked there.  With -a
               or -b the window is moved to the next index after or
               before dst-window (existing windows are moved if
               necessary).  If -k is given and dst-window exists, it is
               killed, otherwise an error is generated.  If -d is given,
               the newly linked window is not selected.

       list-panes [-as] [-F format] [-f filter] [-t target]
                     (alias: lsp)
               If -a is given, target is ignored and all panes on the
               server are listed.  If -s is given, target is a session
               (or the current session).  If neither is given, target is
               a window (or the current window).  -F specifies the
               format of each line and -f a filter.  Only panes for
               which the filter is true are shown.  See the “FORMATS”
               section.

       list-windows [-a] [-F format] [-f filter] [-t target-session]
                     (alias: lsw)
               If -a is given, list all windows on the server.
               Otherwise, list windows in the current session or in
               target-session.  -F specifies the format of each line and
               -f a filter.  Only windows for which the filter is true
               are shown.  See the “FORMATS” section.

       move-pane [-bdfhv] [-l size] [-s src-pane] [-t dst-pane]
                     (alias: movep)
               Does the same as join-pane.

       move-window [-abrdk] [-s src-window] [-t dst-window]
                     (alias: movew)
               This is similar to link-window, except the window at
               src-window is moved to dst-window.  With -r, all windows
               in the session are renumbered in sequential order,
               respecting the base-index option.

       new-window [-abdkPS] [-c start-directory] [-e environment] [-F
               format] [-n window-name] [-t target-window]
               [shell-command]
                     (alias: neww)
               Create a new window.  With -a or -b, the new window is
               inserted at the next index after or before the specified
               target-window, moving windows up if necessary; otherwise
               target-window is the new window location.

               If -d is given, the session does not make the new window
               the current window.  target-window represents the window
               to be created; if the target already exists an error is
               shown, unless the -k flag is used, in which case it is
               destroyed.  If -S is given and a window named window-name
               already exists, it is selected (unless -d is also given
               in which case the command does nothing).

               shell-command is the command to execute.  If
               shell-command is not specified, the value of the
               default-command option is used.  -c specifies the working
               directory in which the new window is created.

               When the shell command completes, the window closes.  See
               the remain-on-exit option to change this behaviour.

               -e takes the form ‘VARIABLE=value’ and sets an
               environment variable for the newly created window; it may
               be specified multiple times.

               The TERM environment variable must be set to ‘screen’ or
               ‘tmux’ for all programs running inside .  New windows
               will automatically have ‘TERM=screen’ added to their
               environment, but care must be taken not to reset this in
               shell start-up files or by the -e option.

               The -P option prints information about the new window
               after it has been created.  By default, it uses the
               format ‘#{session_name}:#{window_index}’ but a different
               format may be specified with -F.

       next-layout [-t target-window]
                     (alias: nextl)
               Move a window to the next layout and rearrange the panes
               to fit.

       next-window [-a] [-t target-session]
                     (alias: next)
               Move to the next window in the session.  If -a is used,
               move to the next window with an alert.

       pipe-pane [-IOo] [-t target-pane] [shell-command]
                     (alias: pipep)
               Pipe output sent by the program in target-pane to a shell
               command or vice versa.  A pane may only be connected to
               one command at a time, any existing pipe is closed before
               shell-command is executed.  The shell-command string may
               contain the special character sequences supported by the
               status-left option.  If no shell-command is given, the
               current pipe (if any) is closed.

               -I and -O specify which of the shell-command output
               streams are connected to the pane: with -I stdout is
               connected (so anything shell-command prints is written to
               the pane as if it were typed); with -O stdin is connected
               (so any output in the pane is piped to shell-command).
               Both may be used together and if neither are specified,
               -O is used.

               The -o option only opens a new pipe if no previous pipe
               exists, allowing a pipe to be toggled with a single key,
               for example:

                     bind-key C-p pipe-pane -o 'cat >>~/output.#I-#P'

       previous-layout [-t target-window]
                     (alias: prevl)
               Move to the previous layout in the session.

       previous-window [-a] [-t target-session]
                     (alias: prev)
               Move to the previous window in the session.  With -a,
               move to the previous window with an alert.

       rename-window [-t target-window] new-name
                     (alias: renamew)
               Rename the current window, or the window at target-window
               if specified, to new-name.

       resize-pane [-DLMRTUZ] [-t target-pane] [-x width] [-y height]
               [adjustment]
                     (alias: resizep)
               Resize a pane, up, down, left or right by adjustment with
               -U, -D, -L or -R, or to an absolute size with -x or -y.
               The adjustment is given in lines or columns (the default
               is 1); -x and -y may be a given as a number of lines or
               columns or followed by ‘%’ for a percentage of the window
               size (for example ‘-x 10%’).  With -Z, the active pane is
               toggled between zoomed (occupying the whole of the
               window) and unzoomed (its normal position in the layout).

               -M begins mouse resizing (only valid if bound to a mouse
               key binding, see “MOUSE SUPPORT”).

               -T trims all lines below the current cursor position and
               moves lines out of the history to replace them.

       resize-window [-aADLRU] [-t target-window] [-x width] [-y height]
               [adjustment]
                     (alias: resizew)
               Resize a window, up, down, left or right by adjustment
               with -U, -D, -L or -R, or to an absolute size with -x or
               -y.  The adjustment is given in lines or cells (the
               default is 1).  -A sets the size of the largest session
               containing the window; -a the size of the smallest.  This
               command will automatically set window-size to manual in
               the window options.

       respawn-pane [-k] [-c start-directory] [-e environment] [-t
               target-pane] [shell-command]
                     (alias: respawnp)
               Reactivate a pane in which the command has exited (see
               the remain-on-exit window option).  If shell-command is
               not given, the command used when the pane was created or
               last respawned is executed.  The pane must be already
               inactive, unless -k is given, in which case any existing
               command is killed.  -c specifies a new working directory
               for the pane.  The -e option has the same meaning as for
               the new-window command.

       respawn-window [-k] [-c start-directory] [-e environment] [-t
               target-window] [shell-command]
                     (alias: respawnw)
               Reactivate a window in which the command has exited (see
               the remain-on-exit window option).  If shell-command is
               not given, the command used when the window was created
               or last respawned is executed.  The window must be
               already inactive, unless -k is given, in which case any
               existing command is killed.  -c specifies a new working
               directory for the window.  The -e option has the same
               meaning as for the new-window command.

       rotate-window [-DUZ] [-t target-window]
                     (alias: rotatew)
               Rotate the positions of the panes within a window, either
               upward (numerically lower) with -U or downward
               (numerically higher).  -Z keeps the window zoomed if it
               was zoomed.

       select-layout [-Enop] [-t target-pane] [layout-name]
                     (alias: selectl)
               Choose a specific layout for a window.  If layout-name is
               not given, the last preset layout used (if any) is
               reapplied.  -n and -p are equivalent to the next-layout
               and previous-layout commands.  -o applies the last set
               layout if possible (undoes the most recent layout
               change).  -E spreads the current pane and any panes next
               to it out evenly.

       select-pane [-DdeLlMmRUZ] [-T title] [-t target-pane]
                     (alias: selectp)
               Make pane target-pane the active pane in its window.  If
               one of -D, -L, -R, or -U is used, respectively the pane
               below, to the left, to the right, or above the target
               pane is used.  -Z keeps the window zoomed if it was
               zoomed.  -l is the same as using the last-pane command.
               -e enables or -d disables input to the pane.  -T sets the
               pane title.

               -m and -M are used to set and clear the marked pane.
               There is one marked pane at a time, setting a new marked
               pane clears the last.  The marked pane is the default
               target for -s to join-pane, move-pane, swap-pane and
               swap-window.

       select-window [-lnpT] [-t target-window]
                     (alias: selectw)
               Select the window at target-window.  -l, -n and -p are
               equivalent to the last-window, next-window and
               previous-window commands.  If -T is given and the
               selected window is already the current window, the
               command behaves like last-window.

       split-window [-bdfhIvPZ] [-c start-directory] [-e environment]
               [-l size] [-t target-pane] [shell-command] [-F format]
                     (alias: splitw)
               Create a new pane by splitting target-pane: -h does a
               horizontal split and -v a vertical split; if neither is
               specified, -v is assumed.  The -l option specifies the
               size of the new pane in lines (for vertical split) or in
               columns (for horizontal split); size may be followed by
               ‘%’ to specify a percentage of the available space.  The
               -b option causes the new pane to be created to the left
               of or above target-pane.  The -f option creates a new
               pane spanning the full window height (with -h) or full
               window width (with -v), instead of splitting the active
               pane.  -Z zooms if the window is not zoomed, or keeps it
               zoomed if already zoomed.

               An empty shell-command ('') will create a pane with no
               command running in it.  Output can be sent to such a pane
               with the display-message command.  The -I flag (if
               shell-command is not specified or empty) will create an
               empty pane and forward any output from stdin to it.  For
               example:

                     $ make 2>&1|tmux splitw -dI &

               All other options have the same meaning as for the
               new-window command.

       swap-pane [-dDUZ] [-s src-pane] [-t dst-pane]
                     (alias: swapp)
               Swap two panes.  If -U is used and no source pane is
               specified with -s, dst-pane is swapped with the previous
               pane (before it numerically); -D swaps with the next pane
               (after it numerically).  -d instructs not to change the
               active pane and -Z keeps the window zoomed if it was
               zoomed.

               If -s is omitted and a marked pane is present (see
               select-pane -m), the marked pane is used rather than the
               current pane.

       swap-window [-d] [-s src-window] [-t dst-window]
                     (alias: swapw)
               This is similar to link-window, except the source and
               destination windows are swapped.  It is an error if no
               window exists at src-window.  If -d is given, the new
               window does not become the current window.

               If -s is omitted and a marked pane is present (see
               select-pane -m), the window containing the marked pane is
               used rather than the current window.

       unlink-window [-k] [-t target-window]
                     (alias: unlinkw)
               Unlink target-window.  Unless -k is given, a window may
               be unlinked only if it is linked to multiple sessions -
               windows may not be linked to no sessions; if -k is
               specified and the window is linked to only one session,
               it is unlinked and destroyed.

KEY BINDINGS         top

       allows a command to be bound to most keys, with or without a
       prefix key.  When specifying keys, most represent themselves (for
       example ‘A’ to ‘Z’).  Ctrl keys may be prefixed with ‘C-’ or ‘^’,
       Shift keys with ‘S-’ and Alt (meta) with ‘M-’.  In addition, the
       following special key names are accepted: Up, Down, Left, Right,
       BSpace, BTab, DC (Delete), End, Enter, Escape, F1 to F12, Home,
       IC (Insert), NPage/PageDown/PgDn, PPage/PageUp/PgUp, Space, and
       Tab.  Note that to bind the ‘"’ or ‘'’ keys, quotation marks are
       necessary, for example:

             bind-key '"' split-window
             bind-key "'" new-window

       A command bound to the Any key will execute for all keys which do
       not have a more specific binding.

       Commands related to key bindings are as follows:

       bind-key [-nr] [-N note] [-T key-table] key command [argument
               ...]
                     (alias: bind)
               Bind key key to command.  Keys are bound in a key table.
               By default (without -T), the key is bound in the prefix
               key table.  This table is used for keys pressed after the
               prefix key (for example, by default ‘c’ is bound to
               new-window in the prefix table, so ‘C-b c’ creates a new
               window).  The root table is used for keys pressed without
               the prefix key: binding ‘c’ to new-window in the root
               table (not recommended) means a plain ‘c’ will create a
               new window.  -n is an alias for -T root.  Keys may also
               be bound in custom key tables and the switch-client -T
               command used to switch to them from a key binding.  The
               -r flag indicates this key may repeat, see the
               repeat-time option.  -N attaches a note to the key (shown
               with list-keys -N).

               To view the default bindings and possible commands, see
               the list-keys command.

       list-keys [-1aN] [-P prefix-string -T key-table] [key]
                     (alias: lsk)
               List key bindings.  There are two forms: the default
               lists keys as bind-key commands; -N lists only keys with
               attached notes and shows only the key and note for each
               key.

               With the default form, all key tables are listed by
               default.  -T lists only keys in key-table.

               With the -N form, only keys in the root and prefix key
               tables are listed by default; -T also lists only keys in
               key-table.  -P specifies a prefix to print before each
               key and -1 lists only the first matching key.  -a lists
               the command for keys that do not have a note rather than
               skipping them.

       send-keys [-FHKlMRX] [-c target-client] [-N repeat-count] [-t
               target-pane] key ...
                     (alias: send)
               Send a key or keys to a window or client.  Each argument
               key is the name of the key (such as ‘C-a’ or ‘NPage’) to
               send; if the string is not recognised as a key, it is
               sent as a series of characters.  If -K is given, keys are
               sent to target-client, so they are looked up in the
               client's key table, rather than to target-pane.  All
               arguments are sent sequentially from first to last.  If
               no keys are given and the command is bound to a key, then
               that key is used.

               The -l flag disables key name lookup and processes the
               keys as literal UTF-8 characters.  The -H flag expects
               each key to be a hexadecimal number for an ASCII
               character.

               The -R flag causes the terminal state to be reset.

               -M passes through a mouse event (only valid if bound to a
               mouse key binding, see “MOUSE SUPPORT”).

               -X is used to send a command into copy mode - see the
               “WINDOWS AND PANES” section.  -N specifies a repeat count
               and -F expands formats in arguments where appropriate.

       send-prefix [-2] [-t target-pane]
               Send the prefix key, or with -2 the secondary prefix key,
               to a window as if it was pressed.

       unbind-key [-anq] [-T key-table] key
                     (alias: unbind)
               Unbind the command bound to key.  -n and -T are the same
               as for bind-key.  If -a is present, all key bindings are
               removed.  The -q option prevents errors being returned.

OPTIONS         top

       The appearance and behaviour of may be modified by changing the
       value of various options.  There are four types of option: server
       options, session options, window options, and pane options.

       The server has a set of global server options which do not apply
       to any particular window or session or pane.  These are altered
       with the set-option -s command, or displayed with the
       show-options -s command.

       In addition, each individual session may have a set of session
       options, and there is a separate set of global session options.
       Sessions which do not have a particular option configured inherit
       the value from the global session options.  Session options are
       set or unset with the set-option command and may be listed with
       the show-options command.  The available server and session
       options are listed under the set-option command.

       Similarly, a set of window options is attached to each window and
       a set of pane options to each pane.  Pane options inherit from
       window options.  This means any pane option may be set as a
       window option to apply the option to all panes in the window
       without the option set, for example these commands will set the
       background colour to red for all panes except pane 0:

             set -w window-style bg=red
             set -pt:.0 window-style bg=blue

       There is also a set of global window options from which any unset
       window or pane options are inherited.  Window and pane options
       are altered with set-option -w and -p commands and displayed with
       show-option -w and -p.

       also supports user options which are prefixed with a ‘@’.  User
       options may have any name, so long as they are prefixed with ‘@’,
       and be set to any string.  For example:

             $ tmux set -wq @foo "abc123"
             $ tmux show -wv @foo
             abc123

       Commands which set options are as follows:

       set-option [-aFgopqsuUw] [-t target-pane] option value
                     (alias: set)
               Set a pane option with -p, a window option with -w, a
               server option with -s, otherwise a session option.  If
               the option is not a user option, -w or -s may be
               unnecessary - will infer the type from the option name,
               assuming -w for pane options.  If -g is given, the global
               session or window option is set.

               -F expands formats in the option value.  The -u flag
               unsets an option, so a session inherits the option from
               the global options (or with -g, restores a global option
               to the default).  -U unsets an option (like -u) but if
               the option is a pane option also unsets the option on any
               panes in the window.  value depends on the option and may
               be a number, a string, or a flag (on, off, or omitted to
               toggle).

               The -o flag prevents setting an option that is already
               set and the -q flag suppresses errors about unknown or
               ambiguous options.

               With -a, and if the option expects a string or a style,
               value is appended to the existing setting.  For example:

                     set -g status-left "foo"
                     set -ag status-left "bar"

               Will result in ‘foobar’.  And:

                     set -g status-style "bg=red"
                     set -ag status-style "fg=blue"

               Will result in a red background and blue foreground.
               Without -a, the result would be the default background
               and a blue foreground.

       show-options [-AgHpqsvw] [-t target-pane] [option]
                     (alias: show)
               Show the pane options (or a single option if option is
               provided) with -p, the window options with -w, the server
               options with -s, otherwise the session options.  If the
               option is not a user option, -w or -s may be unnecessary
               - will infer the type from the option name, assuming -w
               for pane options.  Global session or window options are
               listed if -g is used.  -v shows only the option value,
               not the name.  If -q is set, no error will be returned if
               option is unset.  -H includes hooks (omitted by default).
               -A includes options inherited from a parent set of
               options, such options are marked with an asterisk.

       Available server options are:

       backspace key
               Set the key sent by for backspace.

       buffer-limit number
               Set the number of buffers; as new buffers are added to
               the top of the stack, old ones are removed from the
               bottom if necessary to maintain this maximum length.

       command-alias[] name=value
               This is an array of custom aliases for commands.  If an
               unknown command matches name, it is replaced with value.
               For example, after:

                     set -s command-alias[100] zoom='resize-pane -Z'

               Using:

                     zoom -t:.1

               Is equivalent to:

                     resize-pane -Z -t:.1

               Note that aliases are expanded when a command is parsed
               rather than when it is executed, so binding an alias with
               bind-key will bind the expanded form.

       default-terminal terminal
               Set the default terminal for new windows created in this
               session - the default value of the TERM environment
               variable.  For to work correctly, this must be set to
               ‘screen’, ‘tmux’ or a derivative of them.

       copy-command shell-command
               Give the command to pipe to if the copy-pipe copy mode
               command is used without arguments.

       escape-time time
               Set the time in milliseconds for which waits after an
               escape is input to determine if it is part of a function
               or meta key sequences.  The default is 500 milliseconds.

       editor shell-command
               Set the command used when runs an editor.

       exit-empty [on | off]
               If enabled (the default), the server will exit when there
               are no active sessions.

       exit-unattached [on | off]
               If enabled, the server will exit when there are no
               attached clients.

       extended-keys [on | off | always]
               When on or always, the escape sequence to enable extended
               keys is sent to the terminal, if knows that it is
               supported.  always recognises extended keys itself.  If
               this option is on, will only forward extended keys to
               applications when they request them; if always, will
               always forward the keys.

       focus-events [on | off]
               When enabled, focus events are requested from the
               terminal if supported and passed through to applications
               running in .  Attached clients should be detached and
               attached again after changing this option.

       history-file path
               If not empty, a file to which will write command prompt
               history on exit and load it from on start.

       message-limit number
               Set the number of error or information messages to save
               in the message log for each client.

       prompt-history-limit number
               Set the number of history items to save in the history
               file for each type of command prompt.

       set-clipboard [on | external | off]
               Attempt to set the terminal clipboard content using the
               xterm(1) escape sequence, if there is an Ms entry in the
               terminfo(5) description (see the “TERMINFO EXTENSIONS”
               section).

               If set to on, will both accept the escape sequence to
               create a buffer and attempt to set the terminal
               clipboard.  If set to external, will attempt to set the
               terminal clipboard but ignore attempts by applications to
               set buffers.  If off, will neither accept the clipboard
               escape sequence nor attempt to set the clipboard.

               Note that this feature needs to be enabled in xterm(1) by
               setting the resource:

                     disallowedWindowOps: 20,21,SetXprop

               Or changing this property from the xterm(1) interactive
               menu when required.

       terminal-features[] string
               Set terminal features for terminal types read from
               terminfo(5).  has a set of named terminal features.  Each
               will apply appropriate changes to the terminfo(5) entry
               in use.

               can detect features for a few common terminals; this
               option can be used to easily tell tmux about features
               supported by terminals it cannot detect.  The
               terminal-overrides option allows individual terminfo(5)
               capabilities to be set instead, terminal-features is
               intended for classes of functionality supported in a
               standard way but not reported by terminfo(5).  Care must
               be taken to configure this only with features the
               terminal actually supports.

               This is an array option where each entry is a colon-
               separated string made up of a terminal type pattern
               (matched using fnmatch(3)) followed by a list of terminal
               features.  The available features are:

               256     Supports 256 colours with the SGR escape
                       sequences.

               clipboard
                       Allows setting the system clipboard.

               ccolour
                       Allows setting the cursor colour.

               cstyle  Allows setting the cursor style.

               extkeys
                       Supports extended keys.

               focus   Supports focus reporting.

               hyperlinks
                       Supports OSC 8 hyperlinks.

               ignorefkeys
                       Ignore function keys from terminfo(5) and use the
                       internal set only.

               margins
                       Supports DECSLRM margins.

               mouse   Supports xterm(1) mouse sequences.

               osc7    Supports the OSC 7 working directory extension.

               overline
                       Supports the overline SGR attribute.

               rectfill
                       Supports the DECFRA rectangle fill escape
                       sequence.

               RGB     Supports RGB colour with the SGR escape
                       sequences.

               sixel   Supports SIXEL graphics.

               strikethrough
                       Supports the strikethrough SGR escape sequence.

               sync    Supports synchronized updates.

               title   Supports xterm(1) title setting.

               usstyle
                       Allows underscore style and colour to be set.

       terminal-overrides[] string
               Allow terminal descriptions read using terminfo(5) to be
               overridden.  Each entry is a colon-separated string made
               up of a terminal type pattern (matched using fnmatch(3))
               and a set of name=value entries.

               For example, to set the ‘clear’ terminfo(5) entry to
               ‘\e[H\e[2J’ for all terminal types matching ‘rxvt*’:

                     rxvt*:clear=\e[H\e[2J

               The terminal entry value is passed through strunvis(3)
               before interpretation.

       user-keys[] key
               Set list of user-defined key escape sequences.  Each item
               is associated with a key named ‘User0’, ‘User1’, and so
               on.

               For example:

                     set -s user-keys[0] "\e[5;30012~"
                     bind User0 resize-pane -L 3

       Available session options are:

       activity-action [any | none | current | other]
               Set action on window activity when monitor-activity is
               on.  any means activity in any window linked to a session
               causes a bell or message (depending on visual-activity)
               in the current window of that session, none means all
               activity is ignored (equivalent to monitor-activity being
               off), current means only activity in windows other than
               the current window are ignored and other means activity
               in the current window is ignored but not those in other
               windows.

       assume-paste-time milliseconds
               If keys are entered faster than one in milliseconds, they
               are assumed to have been pasted rather than typed and key
               bindings are not processed.  The default is one
               millisecond and zero disables.

       base-index index
               Set the base index from which an unused index should be
               searched when a new window is created.  The default is
               zero.

       bell-action [any | none | current | other]
               Set action on a bell in a window when monitor-bell is on.
               The values are the same as those for activity-action.

       default-command shell-command
               Set the command used for new windows (if not specified
               when the window is created) to shell-command, which may
               be any sh(1) command.  The default is an empty string,
               which instructs to create a login shell using the value
               of the default-shell option.

       default-shell path
               Specify the default shell.  This is used as the login
               shell for new windows when the default-command option is
               set to empty, and must be the full path of the
               executable.  When started tries to set a default value
               from the first suitable of the SHELL environment
               variable, the shell returned by getpwuid(3), or /bin/sh.
               This option should be configured when is used as a login
               shell.

       default-size XxY
               Set the default size of new windows when the window-size
               option is set to manual or when a session is created with
               new-session -d.  The value is the width and height
               separated by an ‘x’ character.  The default is 80x24.

       destroy-unattached [on | off]
               If enabled and the session is no longer attached to any
               clients, it is destroyed.

       detach-on-destroy [off | on | no-detached | previous | next]
               If on (the default), the client is detached when the
               session it is attached to is destroyed.  If off, the
               client is switched to the most recently active of the
               remaining sessions.  If no-detached, the client is
               detached only if there are no detached sessions; if
               detached sessions exist, the client is switched to the
               most recently active.  If previous or next, the client is
               switched to the previous or next session in alphabetical
               order.

       display-panes-active-colour colour
               Set the colour used by the display-panes command to show
               the indicator for the active pane.

       display-panes-colour colour
               Set the colour used by the display-panes command to show
               the indicators for inactive panes.

       display-panes-time time
               Set the time in milliseconds for which the indicators
               shown by the display-panes command appear.

       display-time time
               Set the amount of time for which status line messages and
               other on-screen indicators are displayed.  If set to 0,
               messages and indicators are displayed until a key is
               pressed.  time is in milliseconds.

       history-limit lines
               Set the maximum number of lines held in window history.
               This setting applies only to new windows - existing
               window histories are not resized and retain the limit at
               the point they were created.

       key-table key-table
               Set the default key table to key-table instead of root.

       lock-after-time number
               Lock the session (like the lock-session command) after
               number seconds of inactivity.  The default is not to lock
               (set to 0).

       lock-command shell-command
               Command to run when locking each client.  The default is
               to run lock(1) with -np.

       menu-style style
               Set the menu style.  See the “STYLES” section on how to
               specify style.  Attributes are ignored.

       menu-selected-style style
               Set the selected menu item style.  See the “STYLES”
               section on how to specify style.  Attributes are ignored.

       menu-border-style style
               Set the menu border style.  See the “STYLES” section on
               how to specify style.  Attributes are ignored.

       menu-border-lines type
               Set the type of characters used for drawing menu borders.
               See popup-border-lines for possible values for
               border-lines.

       message-command-style style
               Set status line message command style.  This is used for
               the command prompt with vi(1) keys when in command mode.
               For how to specify style, see the “STYLES” section.

       message-line [0 | 1 | 2 | 3 | 4]
               Set line on which status line messages and the command
               prompt are shown.

       message-style style
               Set status line message style.  This is used for messages
               and for the command prompt.  For how to specify style,
               see the “STYLES” section.

       mouse [on | off]
               If on, captures the mouse and allows mouse events to be
               bound as key bindings.  See the “MOUSE SUPPORT” section
               for details.

       prefix key
               Set the key accepted as a prefix key.  In addition to the
               standard keys described under “KEY BINDINGS”, prefix can
               be set to the special key ‘None’ to set no prefix.

       prefix2 key
               Set a secondary key accepted as a prefix key.  Like
               prefix, prefix2 can be set to ‘None’.

       renumber-windows [on | off]
               If on, when a window is closed in a session,
               automatically renumber the other windows in numerical
               order.  This respects the base-index option if it has
               been set.  If off, do not renumber the windows.

       repeat-time time
               Allow multiple commands to be entered without pressing
               the prefix-key again in the specified time milliseconds
               (the default is 500).  Whether a key repeats may be set
               when it is bound using the -r flag to bind-key.  Repeat
               is enabled for the default keys bound to the resize-pane
               command.

       set-titles [on | off]
               Attempt to set the client terminal title using the tsl
               and fsl terminfo(5) entries if they exist.  automatically
               sets these to the \e]0;...\007 sequence if the terminal
               appears to be xterm(1).  This option is off by default.

       set-titles-string string
               String used to set the client terminal title if
               set-titles is on.  Formats are expanded, see the
               “FORMATS” section.

       silence-action [any | none | current | other]
               Set action on window silence when monitor-silence is on.
               The values are the same as those for activity-action.

       status [off | on | 2 | 3 | 4 | 5]
               Show or hide the status line or specify its size.  Using
               on gives a status line one row in height; 2, 3, 4 or 5
               more rows.

       status-format[] format
               Specify the format to be used for each line of the status
               line.  The default builds the top status line from the
               various individual status options below.

       status-interval interval
               Update the status line every interval seconds.  By
               default, updates will occur every 15 seconds.  A setting
               of zero disables redrawing at interval.

       status-justify [left | centre | right | absolute-centre]
               Set the position of the window list in the status line:
               left, centre or right.  centre puts the window list in
               the relative centre of the available free space;
               absolute-centre uses the centre of the entire horizontal
               space.

       status-keys [vi | emacs]
               Use vi or emacs-style key bindings in the status line,
               for example at the command prompt.  The default is emacs,
               unless the VISUAL or EDITOR environment variables are set
               and contain the string ‘vi’.

       status-left string
               Display string (by default the session name) to the left
               of the status line.  string will be passed through
               strftime(3).  Also see the “FORMATS” and “STYLES”
               sections.

               For details on how the names and titles can be set see
               the “NAMES AND TITLES” section.

               Examples are:

                     #(sysctl vm.loadavg)
                     #[fg=yellow,bold]#(apm -l)%%#[default] [#S]

               The default is ‘[#S] ’.

       status-left-length length
               Set the maximum length of the left component of the
               status line.  The default is 10.

       status-left-style style
               Set the style of the left part of the status line.  For
               how to specify style, see the “STYLES” section.

       status-position [top | bottom]
               Set the position of the status line.

       status-right string
               Display string to the right of the status line.  By
               default, the current pane title in double quotes, the
               date and the time are shown.  As with status-left, string
               will be passed to strftime(3) and character pairs are
               replaced.

       status-right-length length
               Set the maximum length of the right component of the
               status line.  The default is 40.

       status-right-style style
               Set the style of the right part of the status line.  For
               how to specify style, see the “STYLES” section.

       status-style style
               Set status line style.  For how to specify style, see the
               “STYLES” section.

       update-environment[] variable
               Set list of environment variables to be copied into the
               session environment when a new session is created or an
               existing session is attached.  Any variables that do not
               exist in the source environment are set to be removed
               from the session environment (as if -r was given to the
               set-environment command).

       visual-activity [on | off | both]
               If on, display a message instead of sending a bell when
               activity occurs in a window for which the
               monitor-activity window option is enabled.  If set to
               both, a bell and a message are produced.

       visual-bell [on | off | both]
               If on, a message is shown on a bell in a window for which
               the monitor-bell window option is enabled instead of it
               being passed through to the terminal (which normally
               makes a sound).  If set to both, a bell and a message are
               produced.  Also see the bell-action option.

       visual-silence [on | off | both]
               If monitor-silence is enabled, prints a message after the
               interval has expired on a given window instead of sending
               a bell.  If set to both, a bell and a message are
               produced.

       word-separators string
               Sets the session's conception of what characters are
               considered word separators, for the purposes of the next
               and previous word commands in copy mode.

       Available window options are:

       aggressive-resize [on | off]
               Aggressively resize the chosen window.  This means that
               will resize the window to the size of the smallest or
               largest session (see the window-size option) for which it
               is the current window, rather than the session to which
               it is attached.  The window may resize when the current
               window is changed on another session; this option is good
               for full-screen programs which support SIGWINCH and poor
               for interactive programs such as shells.

       automatic-rename [on | off]
               Control automatic window renaming.  When this setting is
               enabled, will rename the window automatically using the
               format specified by automatic-rename-format.  This flag
               is automatically disabled for an individual window when a
               name is specified at creation with new-window or
               new-session, or later with rename-window, or with a
               terminal escape sequence.  It may be switched off
               globally with:

                     set-option -wg automatic-rename off

       automatic-rename-format format
               The format (see “FORMATS”) used when the automatic-rename
               option is enabled.

       clock-mode-colour colour
               Set clock colour.

       clock-mode-style [12 | 24]
               Set clock hour format.

       fill-character character
               Set the character used to fill areas of the terminal
               unused by a window.

       main-pane-height height
       main-pane-width width
               Set the width or height of the main (left or top) pane in
               the main-horizontal or main-vertical layouts.  If
               suffixed by ‘%’, this is a percentage of the window size.

       copy-mode-match-style style
               Set the style of search matches in copy mode.  For how to
               specify style, see the “STYLES” section.

       copy-mode-mark-style style
               Set the style of the line containing the mark in copy
               mode.  For how to specify style, see the “STYLES”
               section.

       copy-mode-current-match-style style
               Set the style of the current search match in copy mode.
               For how to specify style, see the “STYLES” section.

       mode-keys [vi | emacs]
               Use vi or emacs-style key bindings in copy mode.  The
               default is emacs, unless VISUAL or EDITOR contains ‘vi’.

       mode-style style
               Set window modes style.  For how to specify style, see
               the “STYLES” section.

       monitor-activity [on | off]
               Monitor for activity in the window.  Windows with
               activity are highlighted in the status line.

       monitor-bell [on | off]
               Monitor for a bell in the window.  Windows with a bell
               are highlighted in the status line.

       monitor-silence [interval]
               Monitor for silence (no activity) in the window within
               interval seconds.  Windows that have been silent for the
               interval are highlighted in the status line.  An interval
               of zero disables the monitoring.

       other-pane-height height
               Set the height of the other panes (not the main pane) in
               the main-horizontal layout.  If this option is set to 0
               (the default), it will have no effect.  If both the
               main-pane-height and other-pane-height options are set,
               the main pane will grow taller to make the other panes
               the specified height, but will never shrink to do so.  If
               suffixed by ‘%’, this is a percentage of the window size.

       other-pane-width width
               Like other-pane-height, but set the width of other panes
               in the main-vertical layout.

       pane-active-border-style style
               Set the pane border style for the currently active pane.
               For how to specify style, see the “STYLES” section.
               Attributes are ignored.

       pane-base-index index
               Like base-index, but set the starting index for pane
               numbers.

       pane-border-format format
               Set the text shown in pane border status lines.

       pane-border-indicators [off | colour | arrows | both]
               Indicate active pane by colouring only half of the border
               in windows with exactly two panes, by displaying arrow
               markers, by drawing both or neither.

       pane-border-lines type
               Set the type of characters used for drawing pane borders.
               type may be one of:

               single  single lines using ACS or UTF-8 characters

               double  double lines using UTF-8 characters

               heavy   heavy lines using UTF-8 characters

               simple  simple ASCII characters

               number  the pane number

               ‘double’ and ‘heavy’ will fall back to standard ACS line
               drawing when UTF-8 is not supported.

       pane-border-status [off | top | bottom]
               Turn pane border status lines off or set their position.

       pane-border-style style
               Set the pane border style for panes aside from the active
               pane.  For how to specify style, see the “STYLES”
               section.  Attributes are ignored.

       popup-style style
               Set the popup style.  See the “STYLES” section on how to
               specify style.  Attributes are ignored.

       popup-border-style style
               Set the popup border style.  See the “STYLES” section on
               how to specify style.  Attributes are ignored.

       popup-border-lines type
               Set the type of characters used for drawing popup
               borders.  type may be one of:

               single  single lines using ACS or UTF-8 characters
                       (default)

               rounded
                       variation of single with rounded corners using
                       UTF-8 characters

               double  double lines using UTF-8 characters

               heavy   heavy lines using UTF-8 characters

               simple  simple ASCII characters

               padded  simple ASCII space character

               none    no border

               ‘double’ and ‘heavy’ will fall back to standard ACS line
               drawing when UTF-8 is not supported.

       window-status-activity-style style
               Set status line style for windows with an activity alert.
               For how to specify style, see the “STYLES” section.

       window-status-bell-style style
               Set status line style for windows with a bell alert.  For
               how to specify style, see the “STYLES” section.

       window-status-current-format string
               Like window-status-format, but is the format used when
               the window is the current window.

       window-status-current-style style
               Set status line style for the currently active window.
               For how to specify style, see the “STYLES” section.

       window-status-format string
               Set the format in which the window is displayed in the
               status line window list.  See the “FORMATS” and “STYLES”
               sections.

       window-status-last-style style
               Set status line style for the last active window.  For
               how to specify style, see the “STYLES” section.

       window-status-separator string
               Sets the separator drawn between windows in the status
               line.  The default is a single space character.

       window-status-style style
               Set status line style for a single window.  For how to
               specify style, see the “STYLES” section.

       window-size largest | smallest | manual | latest
               Configure how determines the window size.  If set to
               largest, the size of the largest attached session is
               used; if smallest, the size of the smallest.  If manual,
               the size of a new window is set from the default-size
               option and windows are resized automatically.  With
               latest, uses the size of the client that had the most
               recent activity.  See also the resize-window command and
               the aggressive-resize option.

       wrap-search [on | off]
               If this option is set, searches will wrap around the end
               of the pane contents.  The default is on.

       Available pane options are:

       allow-passthrough [on | off | all]
               Allow programs in the pane to bypass using a terminal
               escape sequence (\ePtmux;...\e\\).  If set to on,
               passthrough sequences will be allowed only if the pane is
               visible.  If set to all, they will be allowed even if the
               pane is invisible.

       allow-rename [on | off]
               Allow programs in the pane to change the window name
               using a terminal escape sequence (\ek...\e\\).

       alternate-screen [on | off]
               This option configures whether programs running inside
               the pane may use the terminal alternate screen feature,
               which allows the smcup and rmcup terminfo(5)
               capabilities.  The alternate screen feature preserves the
               contents of the window when an interactive application
               starts and restores it on exit, so that any output
               visible before the application starts reappears unchanged
               after it exits.

       cursor-colour colour
               Set the colour of the cursor.

       pane-colours[] colour
               The default colour palette.  Each entry in the array
               defines the colour uses when the colour with that index
               is requested.  The index may be from zero to 255.

       cursor-style style
               Set the style of the cursor.  Available styles are:
               default, blinking-block, block, blinking-underline,
               underline, blinking-bar, bar.

       remain-on-exit [on | off | failed]
               A pane with this flag set is not destroyed when the
               program running in it exits.  If set to failed, then only
               when the program exit status is not zero.  The pane may
               be reactivated with the respawn-pane command.

       remain-on-exit-format string
               Set the text shown at the bottom of exited panes when
               remain-on-exit is enabled.

       scroll-on-clear [on | off]
               When the entire screen is cleared and this option is on,
               scroll the contents of the screen into history before
               clearing it.

       synchronize-panes [on | off]
               Duplicate input to all other panes in the same window
               where this option is also on (only for panes that are not
               in any mode).

       window-active-style style
               Set the pane style when it is the active pane.  For how
               to specify style, see the “STYLES” section.

       window-style style
               Set the pane style.  For how to specify style, see the
               “STYLES” section.

HOOKS         top

       allows commands to run on various triggers, called hooks.  Most
       commands have an after hook and there are a number of hooks not
       associated with commands.

       Hooks are stored as array options, members of the array are
       executed in order when the hook is triggered.  Like options
       different hooks may be global or belong to a session, window or
       pane.  Hooks may be configured with the set-hook or set-option
       commands and displayed with show-hooks or show-options -H.  The
       following two commands are equivalent:

              set-hook -g pane-mode-changed[42] 'set -g status-left-style bg=red'
              set-option -g pane-mode-changed[42] 'set -g status-left-style bg=red'

       Setting a hook without specifying an array index clears the hook
       and sets the first member of the array.

       A command's after hook is run after it completes, except when the
       command is run as part of a hook itself.  They are named with an
       ‘after-’ prefix.  For example, the following command adds a hook
       to select the even-vertical layout after every split-window:

             set-hook -g after-split-window "selectl even-vertical"

       All the notifications listed in the “CONTROL MODE” section are
       hooks (without any arguments), except %exit.  The following
       additional hooks are available:

       alert-activity          Run when a window has activity.  See
                               monitor-activity.

       alert-bell              Run when a window has received a bell.
                               See monitor-bell.

       alert-silence           Run when a window has been silent.  See
                               monitor-silence.

       client-active           Run when a client becomes the latest
                               active client of its session.

       client-attached         Run when a client is attached.

       client-detached         Run when a client is detached

       client-focus-in         Run when focus enters a client

       client-focus-out        Run when focus exits a client

       client-resized          Run when a client is resized.

       client-session-changed  Run when a client's attached session is
                               changed.

       pane-died               Run when the program running in a pane
                               exits, but remain-on-exit is on so the
                               pane has not closed.

       pane-exited             Run when the program running in a pane
                               exits.

       pane-focus-in           Run when the focus enters a pane, if the
                               focus-events option is on.

       pane-focus-out          Run when the focus exits a pane, if the
                               focus-events option is on.

       pane-set-clipboard      Run when the terminal clipboard is set
                               using the xterm(1) escape sequence.

       session-created         Run when a new session created.

       session-closed          Run when a session closed.

       session-renamed         Run when a session is renamed.

       window-linked           Run when a window is linked into a
                               session.

       window-renamed          Run when a window is renamed.

       window-resized          Run when a window is resized.  This may
                               be after the client-resized hook is run.

       window-unlinked         Run when a window is unlinked from a
                               session.

       Hooks are managed with these commands:

       set-hook [-agpRuw] [-t target-pane] hook-name command
               Without -R, sets (or with -u unsets) hook hook-name to
               command.  The flags are the same as for set-option.

               With -R, run hook-name immediately.

       show-hooks [-gpw] [-t target-pane]
               Shows hooks.  The flags are the same as for show-options.

MOUSE SUPPORT         top

       If the mouse option is on (the default is off), allows mouse
       events to be bound as keys.  The name of each key is made up of a
       mouse event (such as ‘MouseUp1’) and a location suffix, one of
       the following:

             Pane             the contents of a pane
             Border           a pane border
             Status           the status line window list
             StatusLeft       the left part of the status line
             StatusRight      the right part of the status line
             StatusDefault    any other part of the status line

       The following mouse events are available:

             WheelUp       WheelDown
             MouseDown1    MouseUp1      MouseDrag1   MouseDragEnd1
             MouseDown2    MouseUp2      MouseDrag2   MouseDragEnd2
             MouseDown3    MouseUp3      MouseDrag3   MouseDragEnd3
             SecondClick1  SecondClick2  SecondClick3
             DoubleClick1  DoubleClick2  DoubleClick3
             TripleClick1  TripleClick2  TripleClick3

       The ‘SecondClick’ events are fired for the second click of a
       double click, even if there may be a third click which will fire
       ‘TripleClick’ instead of ‘DoubleClick’.

       Each should be suffixed with a location, for example
       ‘MouseDown1Status’.

       The special token ‘{mouse}’ or ‘=’ may be used as target-window
       or target-pane in commands bound to mouse key bindings.  It
       resolves to the window or pane over which the mouse event took
       place (for example, the window in the status line over which
       button 1 was released for a ‘MouseUp1Status’ binding, or the pane
       over which the wheel was scrolled for a ‘WheelDownPane’ binding).

       The send-keys -M flag may be used to forward a mouse event to a
       pane.

       The default key bindings allow the mouse to be used to select and
       resize panes, to copy text and to change window using the status
       line.  These take effect if the mouse option is turned on.

FORMATS         top

       Certain commands accept the -F flag with a format argument.  This
       is a string which controls the output format of the command.
       Format variables are enclosed in ‘#{’ and ‘}’, for example
       ‘#{session_name}’.  The possible variables are listed in the
       table below, or the name of a option may be used for an option's
       value.  Some variables have a shorter alias such as ‘#S’; ‘##’ is
       replaced by a single ‘#’, ‘#,’ by a ‘,’ and ‘#}’ by a ‘}’.

       Conditionals are available by prefixing with ‘?’ and separating
       two alternatives with a comma; if the specified variable exists
       and is not zero, the first alternative is chosen, otherwise the
       second is used.  For example ‘#{?session_attached,attached,not
       attached}’ will include the string ‘attached’ if the session is
       attached and the string ‘not attached’ if it is unattached, or
       ‘#{?automatic-rename,yes,no}’ will include ‘yes’ if
       automatic-rename is enabled, or ‘no’ if not.  Conditionals can be
       nested arbitrarily.  Inside a conditional, ‘,’ and ‘}’ must be
       escaped as ‘#,’ and ‘#}’, unless they are part of a ‘#{...}’
       replacement.  For example:

             #{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .

       String comparisons may be expressed by prefixing two comma-
       separated alternatives by ‘==’, ‘!=’, ‘<’, ‘>’, ‘<=’ or ‘>=’ and
       a colon.  For example ‘#{==:#{host},myhost}’ will be replaced by
       ‘1’ if running on ‘myhost’, otherwise by ‘0’.  ‘||’ and ‘&&’
       evaluate to true if either or both of two comma-separated
       alternatives are true, for example
       ‘#{||:#{pane_in_mode},#{alternate_on}}’.

       An ‘m’ specifies an fnmatch(3) or regular expression comparison.
       The first argument is the pattern and the second the string to
       compare.  An optional argument specifies flags: ‘r’ means the
       pattern is a regular expression instead of the default fnmatch(3)
       pattern, and ‘i’ means to ignore case.  For example:
       ‘#{m:*foo*,#{host}}’ or ‘#{m/ri:^A,MYVAR}’.  A ‘C’ performs a
       search for an fnmatch(3) pattern or regular expression in the
       pane content and evaluates to zero if not found, or a line number
       if found.  Like ‘m’, an ‘r’ flag means search for a regular
       expression and ‘i’ ignores case.  For example: ‘#{C/r:^Start}’

       Numeric operators may be performed by prefixing two comma-
       separated alternatives with an ‘e’ and an operator.  An optional
       ‘f’ flag may be given after the operator to use floating point
       numbers, otherwise integers are used.  This may be followed by a
       number giving the number of decimal places to use for the result.
       The available operators are: addition ‘+’, subtraction ‘-’,
       multiplication ‘*’, division ‘/’, modulus ‘m’ or ‘%’ (note that
       ‘%’ must be escaped as ‘%%’ in formats which are also expanded by
       strftime(3)) and numeric comparison operators ‘==’, ‘!=’, ‘<’,
       ‘<=’, ‘>’ and ‘>=’.  For example, ‘#{e|*|f|4:5.5,3}’ multiplies
       5.5 by 3 for a result with four decimal places and ‘#{e|%%:7,3}’
       returns the modulus of 7 and 3.  ‘a’ replaces a numeric argument
       by its ASCII equivalent, so ‘#{a:98}’ results in ‘b’.  ‘c’
       replaces a colour by its six-digit hexadecimal RGB value.

       A limit may be placed on the length of the resultant string by
       prefixing it by an ‘=’, a number and a colon.  Positive numbers
       count from the start of the string and negative from the end, so
       ‘#{=5:pane_title}’ will include at most the first five characters
       of the pane title, or ‘#{=-5:pane_title}’ the last five
       characters.  A suffix or prefix may be given as a second argument
       - if provided then it is appended or prepended to the string if
       the length has been trimmed, for example ‘#{=/5/...:pane_title}’
       will append ‘...’ if the pane title is more than five characters.
       Similarly, ‘p’ pads the string to a given width, for example
       ‘#{p10:pane_title}’ will result in a width of at least 10
       characters.  A positive width pads on the left, a negative on the
       right.  ‘n’ expands to the length of the variable and ‘w’ to its
       width when displayed, for example ‘#{n:window_name}’.

       Prefixing a time variable with ‘t:’ will convert it to a string,
       so if ‘#{window_activity}’ gives ‘1445765102’,
       ‘#{t:window_activity}’ gives ‘Sun Oct 25 09:25:02 2015’.  Adding
       ‘p (’ ‘`t/p`’) will use shorter but less accurate time format for
       times in the past.  A custom format may be given using an ‘f’
       suffix (note that ‘%’ must be escaped as ‘%%’ if the format is
       separately being passed through strftime(3), for example in the
       status-left option): ‘#{t/f/%%H#:%%M:window_activity}’, see
       strftime(3).

       The ‘b:’ and ‘d:’ prefixes are basename(3) and dirname(3) of the
       variable respectively.  ‘q:’ will escape sh(1) special characters
       or with a ‘h’ suffix, escape hash characters (so ‘#’ becomes
       ‘##’).  ‘E:’ will expand the format twice, for example
       ‘#{E:status-left}’ is the result of expanding the content of the
       status-left option rather than the option itself.  ‘T:’ is like
       ‘E:’ but also expands strftime(3) specifiers.  ‘S:’, ‘W:’, ‘P:’
       or ‘L:’ will loop over each session, window, pane or client and
       insert the format once for each.  For windows and panes, two
       comma-separated formats may be given: the second is used for the
       current window or active pane.  For example, to get a list of
       windows formatted like the status line:

             #{W:#{E:window-status-format} ,#{E:window-status-current-format} }

       ‘N:’ checks if a window (without any suffix or with the ‘w’
       suffix) or a session (with the ‘s’ suffix) name exists, for
       example ‘`N/w:foo`’ is replaced with 1 if a window named ‘foo’
       exists.

       A prefix of the form ‘s/foo/bar/:’ will substitute ‘foo’ with
       ‘bar’ throughout.  The first argument may be an extended regular
       expression and a final argument may be ‘i’ to ignore case, for
       example ‘s/a(.)/\1x/i:’ would change ‘abABab’ into ‘bxBxbx’.  A
       different delimiter character may also be used, to avoid
       collisions with literal slashes in the pattern.  For example,
       ‘s|foo/|bar/|:’ will substitute ‘foo/’ with ‘bar/’ throughout.

       In addition, the last line of a shell command's output may be
       inserted using ‘#()’.  For example, ‘#(uptime)’ will insert the
       system's uptime.  When constructing formats, does not wait for
       ‘#()’ commands to finish; instead, the previous result from
       running the same command is used, or a placeholder if the command
       has not been run before.  If the command hasn't exited, the most
       recent line of output will be used, but the status line will not
       be updated more than once a second.  Commands are executed using
       /bin/sh and with the global environment set (see the “GLOBAL AND
       SESSION ENVIRONMENT” section).

       An ‘l’ specifies that a string should be interpreted literally
       and not expanded.  For example ‘#{l:#{?pane_in_mode,yes,no}}’
       will be replaced by ‘#{?pane_in_mode,yes,no}’.

       The following variables are available, where appropriate:

       Variable name          Alias    Replaced with
       active_window_index             Index of active window in session
       alternate_on                    1 if pane is in alternate screen
       alternate_saved_x               Saved cursor X in alternate
                                       screen
       alternate_saved_y               Saved cursor Y in alternate
                                       screen
       buffer_created                  Time buffer created
       buffer_name                     Name of buffer
       buffer_sample                   Sample of start of buffer
       buffer_size                     Size of the specified buffer in
                                       bytes
       client_activity                 Time client last had activity
       client_cell_height              Height of each client cell in
                                       pixels
       client_cell_width               Width of each client cell in
                                       pixels
       client_control_mode             1 if client is in control mode
       client_created                  Time client created
       client_discarded                Bytes discarded when client
                                       behind
       client_flags                    List of client flags
       client_height                   Height of client
       client_key_table                Current key table
       client_last_session             Name of the client's last session
       client_name                     Name of client
       client_pid                      PID of client process
       client_prefix                   1 if prefix key has been pressed
       client_readonly                 1 if client is read-only
       client_session                  Name of the client's session
       client_termfeatures             Terminal features of client, if
                                       any
       client_termname                 Terminal name of client
       client_termtype                 Terminal type of client, if
                                       available
       client_tty                      Pseudo terminal of client
       client_uid                      UID of client process
       client_user                     User of client process
       client_utf8                     1 if client supports UTF-8
       client_width                    Width of client
       client_written                  Bytes written to client
       command                         Name of command in use, if any
       command_list_alias              Command alias if listing commands
       command_list_name               Command name if listing commands
       command_list_usage              Command usage if listing commands
       config_files                    List of configuration files
                                       loaded
       copy_cursor_line                Line the cursor is on in copy
                                       mode
       copy_cursor_word                Word under cursor in copy mode
       copy_cursor_x                   Cursor X position in copy mode
       copy_cursor_y                   Cursor Y position in copy mode
       current_file                    Current configuration file
       cursor_character                Character at cursor in pane
       cursor_flag                     Pane cursor flag
       cursor_x                        Cursor X position in pane
       cursor_y                        Cursor Y position in pane
       history_bytes                   Number of bytes in window history
       history_limit                   Maximum window history lines
       history_size                    Size of history in lines
       hook                            Name of running hook, if any
       hook_client                     Name of client where hook was
                                       run, if any
       hook_pane                       ID of pane where hook was run, if
                                       any
       hook_session                    ID of session where hook was run,
                                       if any
       hook_session_name               Name of session where hook was
                                       run, if any
       hook_window                     ID of window where hook was run,
                                       if any
       hook_window_name                Name of window where hook was
                                       run, if any
       host                   #H       Hostname of local host
       host_short             #h       Hostname of local host (no domain
                                       name)
       insert_flag                     Pane insert flag
       keypad_cursor_flag              Pane keypad cursor flag
       keypad_flag                     Pane keypad flag
       last_window_index               Index of last window in session
       line                            Line number in the list
       mouse_all_flag                  Pane mouse all flag
       mouse_any_flag                  Pane mouse any flag
       mouse_button_flag               Pane mouse button flag
       mouse_hyperlink                 Hyperlink under mouse, if any
       mouse_line                      Line under mouse, if any
       mouse_sgr_flag                  Pane mouse SGR flag
       mouse_standard_flag             Pane mouse standard flag
       mouse_status_line               Status line on which mouse event
                                       took place
       mouse_status_range              Range type or argument of mouse
                                       event on status line
       mouse_utf8_flag                 Pane mouse UTF-8 flag
       mouse_word                      Word under mouse, if any
       mouse_x                         Mouse X position, if any
       mouse_y                         Mouse Y position, if any
       next_session_id                 Unique session ID for next new
                                       session
       origin_flag                     Pane origin flag
       pane_active                     1 if active pane
       pane_at_bottom                  1 if pane is at the bottom of
                                       window
       pane_at_left                    1 if pane is at the left of
                                       window
       pane_at_right                   1 if pane is at the right of
                                       window
       pane_at_top                     1 if pane is at the top of window
       pane_bg                         Pane background colour
       pane_bottom                     Bottom of pane
       pane_current_command            Current command if available
       pane_current_path               Current path if available
       pane_dead                       1 if pane is dead
       pane_dead_signal                Exit signal of process in dead
                                       pane
       pane_dead_status                Exit status of process in dead
                                       pane
       pane_dead_time                  Exit time of process in dead pane
       pane_fg                         Pane foreground colour
       pane_format                     1 if format is for a pane
       pane_height                     Height of pane
       pane_id                #D       Unique pane ID
       pane_in_mode                    1 if pane is in a mode
       pane_index             #P       Index of pane
       pane_input_off                  1 if input to pane is disabled
       pane_last                       1 if last pane
       pane_left                       Left of pane
       pane_marked                     1 if this is the marked pane
       pane_marked_set                 1 if a marked pane is set
       pane_mode                       Name of pane mode, if any
       pane_path                       Path of pane (can be set by
                                       application)
       pane_pid                        PID of first process in pane
       pane_pipe                       1 if pane is being piped
       pane_right                      Right of pane
       pane_search_string              Last search string in copy mode
       pane_start_command              Command pane started with
       pane_start_path                 Path pane started with
       pane_synchronized               1 if pane is synchronized
       pane_tabs                       Pane tab positions
       pane_title             #T       Title of pane (can be set by
                                       application)
       pane_top                        Top of pane
       pane_tty                        Pseudo terminal of pane
       pane_unseen_changes             1 if there were changes in pane
                                       while in mode
       pane_width                      Width of pane
       pid                             Server PID
       rectangle_toggle                1 if rectangle selection is
                                       activated
       scroll_position                 Scroll position in copy mode
       scroll_region_lower             Bottom of scroll region in pane
       scroll_region_upper             Top of scroll region in pane
       search_match                    Search match if any
       search_present                  1 if search started in copy mode
       selection_active                1 if selection started and
                                       changes with the cursor in copy
                                       mode
       selection_end_x                 X position of the end of the
                                       selection
       selection_end_y                 Y position of the end of the
                                       selection
       selection_present               1 if selection started in copy
                                       mode
       selection_start_x               X position of the start of the
                                       selection
       selection_start_y               Y position of the start of the
                                       selection
       server_sessions                 Number of sessions
       session_activity                Time of session last activity
       session_alerts                  List of window indexes with
                                       alerts
       session_attached                Number of clients session is
                                       attached to
       session_attached_list           List of clients session is
                                       attached to
       session_created                 Time session created
       session_format                  1 if format is for a session
       session_group                   Name of session group
       session_group_attached          Number of clients sessions in
                                       group are attached to
       session_group_attached_list     List of clients sessions in group
                                       are attached to
       session_group_list              List of sessions in group
       session_group_many_attached     1 if multiple clients attached to
                                       sessions in group
       session_group_size              Size of session group
       session_grouped                 1 if session in a group
       session_id                      Unique session ID
       session_last_attached           Time session last attached
       session_many_attached           1 if multiple clients attached
       session_marked                  1 if this session contains the
                                       marked pane
       session_name           #S       Name of session
       session_path                    Working directory of session
       session_stack                   Window indexes in most recent
                                       order
       session_windows                 Number of windows in session
       socket_path                     Server socket path
       start_time                      Server start time
       uid                             Server UID
       user                            Server user
       version                         Server version
       window_active                   1 if window active
       window_active_clients           Number of clients viewing this
                                       window
       window_active_clients_list      List of clients viewing this
                                       window
       window_active_sessions          Number of sessions on which this
                                       window is active
       window_active_sessions_list     List of sessions on which this
                                       window is active
       window_activity                 Time of window last activity
       window_activity_flag            1 if window has activity
       window_bell_flag                1 if window has bell
       window_bigger                   1 if window is larger than client
       window_cell_height              Height of each cell in pixels
       window_cell_width               Width of each cell in pixels
       window_end_flag                 1 if window has the highest index
       window_flags           #F       Window flags with # escaped as ##
       window_format                   1 if format is for a window
       window_height                   Height of window
       window_id                       Unique window ID
       window_index           #I       Index of window
       window_last_flag                1 if window is the last used
       window_layout                   Window layout description,
                                       ignoring zoomed window panes
       window_linked                   1 if window is linked across
                                       sessions
       window_linked_sessions          Number of sessions this window is
                                       linked to
       window_linked_sessions_list     List of sessions this window is
                                       linked to
       window_marked_flag              1 if window contains the marked
                                       pane
       window_name            #W       Name of window
       window_offset_x                 X offset into window if larger
                                       than client
       window_offset_y                 Y offset into window if larger
                                       than client
       window_panes                    Number of panes in window
       window_raw_flags                Window flags with nothing escaped
       window_silence_flag             1 if window has silence alert
       window_stack_index              Index in session most recent
                                       stack
       window_start_flag               1 if window has the lowest index
       window_visible_layout           Window layout description,
                                       respecting zoomed window panes
       window_width                    Width of window
       window_zoomed_flag              1 if window is zoomed
       wrap_flag                       Pane wrap flag

STYLES         top

       offers various options to specify the colour and attributes of
       aspects of the interface, for example status-style for the status
       line.  In addition, embedded styles may be specified in format
       options, such as status-left, by enclosing them in ‘#[’ and ‘]’.

       A style may be the single term ‘default’ to specify the default
       style (which may come from an option, for example status-style in
       the status line) or a space or comma separated list of the
       following:

       fg=colour
               Set the foreground colour.  The colour is one of: black,
               red, green, yellow, blue, magenta, cyan, white; if
               supported the bright variants brightred, brightgreen,
               brightyellow; colour0 to colour255 from the 256-colour
               set; default for the default colour; terminal for the
               terminal default colour; or a hexadecimal RGB string such
               as ‘#ffffff’.

       bg=colour
               Set the background colour.

       us=colour
               Set the underscore colour.

       none    Set no attributes (turn off any active attributes).

       acs, bright (or bold), dim, underscore, blink, reverse, hidden,
               italics, overline, strikethrough, double-underscore,
               curly-underscore, dotted-underscore, dashed-underscore
               Set an attribute.  Any of the attributes may be prefixed
               with ‘no’ to unset.  acs is the terminal alternate
               character set.

       align=left (or noalign), align=centre, align=right
               Align text to the left, centre or right of the available
               space if appropriate.

       fill=colour
               Fill the available space with a background colour if
               appropriate.

       list=on, list=focus, list=left-marker, list=right-marker, nolist
               Mark the position of the various window list components
               in the status-format option: list=on marks the start of
               the list; list=focus is the part of the list that should
               be kept in focus if the entire list won't fit in the
               available space (typically the current window);
               list=left-marker and list=right-marker mark the text to
               be used to mark that text has been trimmed from the left
               or right of the list if there is not enough space.

       push-default, pop-default
               Store the current colours and attributes as the default
               or reset to the previous default.  A push-default affects
               any subsequent use of the default term until a
               pop-default.  Only one default may be pushed (each
               push-default replaces the previous saved default).

       range=left, range=right, range=session|X, range=window|X,
               range=pane|X, range=user|X, norange
               Mark a range for mouse events in the status-format
               option.  When a mouse event occurs in the range=left or
               range=right range, the ‘StatusLeft’ and ‘StatusRight’ key
               bindings are triggered.

               range=session|X, range=window|X and range=pane|X are
               ranges for a session, window or pane.  These trigger the
               ‘Status’ mouse key with the target session, window or
               pane given by the ‘X’ argument.  ‘X’ is a session ID,
               window index in the current session or a pane ID.  For
               these, the mouse_status_range format variable will be set
               to ‘session’, ‘window’ or ‘pane’.

               range=user|X is a user-defined range; it triggers the
               ‘Status’ mouse key.  The argument ‘X’ will be available
               in the mouse_status_range format variable.  ‘X’ must be
               at most 15 bytes in length.

       Examples are:

             fg=yellow bold underscore blink
             bg=black,fg=default,noreverse

NAMES AND TITLES         top

       distinguishes between names and titles.  Windows and sessions
       have names, which may be used to specify them in targets and are
       displayed in the status line and various lists: the name is the
       identifier for a window or session.  Only panes have titles.  A
       pane's title is typically set by the program running inside the
       pane using an escape sequence (like it would set the xterm(1)
       window title in X(7)).  Windows themselves do not have titles - a
       window's title is the title of its active pane.  itself may set
       the title of the terminal in which the client is running, see the
       set-titles option.

       A session's name is set with the new-session and rename-session
       commands.  A window's name is set with one of:

       1.      A command argument (such as -n for new-window or
               new-session).

       2.      An escape sequence (if the allow-rename option is turned
               on):

                     $ printf '\033kWINDOW_NAME\033\\'

       3.      Automatic renaming, which sets the name to the active
               command in the window's active pane.  See the
               automatic-rename option.

       When a pane is first created, its title is the hostname.  A
       pane's title can be set via the title setting escape sequence,
       for example:

             $ printf '\033]2;My Title\033\\'

       It can also be modified with the select-pane -T command.

GLOBAL AND SESSION ENVIRONMENT         top

       When the server is started, copies the environment into the
       global environment; in addition, each session has a session
       environment.  When a window is created, the session and global
       environments are merged.  If a variable exists in both, the value
       from the session environment is used.  The result is the initial
       environment passed to the new process.

       The update-environment session option may be used to update the
       session environment from the client when a new session is created
       or an old reattached.  also initialises the TMUX variable with
       some internal information to allow commands to be executed from
       inside, and the TERM variable with the correct terminal setting
       of ‘screen’.

       Variables in both session and global environments may be marked
       as hidden.  Hidden variables are not passed into the environment
       of new processes and instead can only be used by tmux itself (for
       example in formats, see the “FORMATS” section).

       Commands to alter and view the environment are:

       set-environment [-Fhgru] [-t target-session] name [value]
                     (alias: setenv)
               Set or unset an environment variable.  If -g is used, the
               change is made in the global environment; otherwise, it
               is applied to the session environment for target-session.
               If -F is present, then value is expanded as a format.
               The -u flag unsets a variable.  -r indicates the variable
               is to be removed from the environment before starting a
               new process.  -h marks the variable as hidden.

       show-environment [-hgs] [-t target-session] [variable]
                     (alias: showenv)
               Display the environment for target-session or the global
               environment with -g.  If variable is omitted, all
               variables are shown.  Variables removed from the
               environment are prefixed with ‘-’.  If -s is used, the
               output is formatted as a set of Bourne shell commands.
               -h shows hidden variables (omitted by default).

STATUS LINE         top

       includes an optional status line which is displayed in the bottom
       line of each terminal.

       By default, the status line is enabled and one line in height (it
       may be disabled or made multiple lines with the status session
       option) and contains, from left-to-right: the name of the current
       session in square brackets; the window list; the title of the
       active pane in double quotes; and the time and date.

       Each line of the status line is configured with the status-format
       option.  The default is made of three parts: configurable left
       and right sections (which may contain dynamic content such as the
       time or output from a shell command, see the status-left,
       status-left-length, status-right, and status-right-length options
       below), and a central window list.  By default, the window list
       shows the index, name and (if any) flag of the windows present in
       the current session in ascending numerical order.  It may be
       customised with the window-status-format and
       window-status-current-format options.  The flag is one of the
       following symbols appended to the window name:

             Symbol    Meaning
             *         Denotes the current window.
             -         Marks the last window (previously selected).
             #         Window activity is monitored and activity has
                                  been detected.
             !         Window bells are monitored and a bell has
                                  occurred in the window.
             ~         The window has been silent for the monitor-
                                  silence interval.
             M         The window contains the marked pane.
             Z         The window's active pane is zoomed.

       The # symbol relates to the monitor-activity window option.  The
       window name is printed in inverted colours if an alert (bell,
       activity or silence) is present.

       The colour and attributes of the status line may be configured,
       the entire status line using the status-style session option and
       individual windows using the window-status-style window option.

       The status line is automatically refreshed at interval if it has
       changed, the interval may be controlled with the status-interval
       session option.

       Commands related to the status line are as follows:

       clear-prompt-history [-T prompt-type]
                     (alias: clearphist)
               Clear status prompt history for prompt type prompt-type.
               If -T is omitted, then clear history for all types.  See
               command-prompt for possible values for prompt-type.

       command-prompt [-1bFikN] [-I inputs] [-p prompts] [-t
               target-client] [-T prompt-type] [template]
               Open the command prompt in a client.  This may be used
               from inside to execute commands interactively.

               If template is specified, it is used as the command.
               With -F, template is expanded as a format.

               If present, -I is a comma-separated list of the initial
               text for each prompt.  If -p is given, prompts is a
               comma-separated list of prompts which are displayed in
               order; otherwise a single prompt is displayed,
               constructed from template if it is present, or ‘:’ if
               not.

               Before the command is executed, the first occurrence of
               the string ‘%%’ and all occurrences of ‘%1’ are replaced
               by the response to the first prompt, all ‘%2’ are
               replaced with the response to the second prompt, and so
               on for further prompts.  Up to nine prompt responses may
               be replaced (‘%1’ to ‘%9’).  ‘%%%’ is like ‘%%’ but any
               quotation marks are escaped.

               -1 makes the prompt only accept one key press, in this
               case the resulting input is a single character.  -k is
               like -1 but the key press is translated to a key name.
               -N makes the prompt only accept numeric key presses.  -i
               executes the command every time the prompt input changes
               instead of when the user exits the command prompt.

               -T tells the prompt type.  This affects what completions
               are offered when Tab is pressed.  Available types are:
               ‘command’, ‘search’, ‘target’ and ‘window-target’.

               The following keys have a special meaning in the command
               prompt, depending on the value of the status-keys option:

                     Function                             vi        emacs
                     Cancel command
                                                                              prompt                q         Escape
                     Delete from cursor to start of word            C-w
                     Delete entire command                d         C-u
                     Delete from cursor to end            D         C-k
                     Execute
                                                                              command                      Enter     Enter
                     Get next command from history                  Down
                     Get previous command from history              Up
                     Insert top paste buffer              p         C-y
                     Look for completions                 Tab       Tab
                     Move cursor left                     h         Left
                     Move cursor
                                                                              right                    l         Right
                     Move cursor to end                   $         C-e
                     Move cursor to next word             w         M-f
                     Move cursor to previous word         b         M-b
                     Move cursor to start                 0         C-a
                     Transpose characters                           C-t

               With -b, the prompt is shown in the background and the
               invoking client does not exit until it is dismissed.

       confirm-before [-by] [-c confirm-key] [-p prompt] [-t
               target-client] command
                     (alias: confirm)
               Ask for confirmation before executing command.  If -p is
               given, prompt is the prompt to display; otherwise a
               prompt is constructed from command.  It may contain the
               special character sequences supported by the status-left
               option.  With -b, the prompt is shown in the background
               and the invoking client does not exit until it is
               dismissed.  -y changes the default behaviour (if Enter
               alone is pressed) of the prompt to run the command.  -c
               changes the confirmation key to confirm-key; the default
               is ‘y’.

       display-menu [-O] [-b border-lines] [-c target-client] [-C
               starting-choice] [-H selected-style] [-s style] [-S
               border-style] [-t target-pane] [-T title] [-x position]
               [-y position] name key command [argument ...]
                     (alias: menu)
               Display a menu on target-client.  target-pane gives the
               target for any commands run from the menu.

               A menu is passed as a series of arguments: first the menu
               item name, second the key shortcut (or empty for none)
               and third the command to run when the menu item is
               chosen.  The name and command are formats, see the
               “FORMATS” and “STYLES” sections.  If the name begins with
               a hyphen (-), then the item is disabled (shown dim) and
               may not be chosen.  The name may be empty for a separator
               line, in which case both the key and command should be
               omitted.

               -b sets the type of characters used for drawing menu
               borders.  See popup-border-lines for possible values for
               border-lines.

               -H sets the style for the selected menu item (see
               “STYLES”).

               -s sets the style for the menu and -S sets the style for
               the menu border (see “STYLES”).

               -T is a format for the menu title (see “FORMATS”).

               -C sets the menu item selected by default, if the menu is
               not bound to a mouse key binding.

               -x and -y give the position of the menu.  Both may be a
               row or column number, or one of the following special
               values:

                     Value    Flag    Meaning
                     C        Both    The centre of the terminal
                     R        -x      The right side of the terminal
                     P        Both    The bottom left of the pane
                     M        Both    The mouse position
                     W        Both    The window position on the status
                                      line
                     S        -y      The line above or below the status
                                      line

               Or a format, which is expanded including the following
               additional variables:

                     Variable name                 Replaced with
                     popup_centre_x                Centered in the
                                                   client
                     popup_centre_y                Centered in the
                                                   client
                     popup_height                  Height of menu or
                                                   popup
                     popup_mouse_bottom            Bottom of at the
                                                   mouse
                     popup_mouse_centre_x          Horizontal centre at
                                                   the mouse
                     popup_mouse_centre_y          Vertical centre at
                                                   the mouse
                     popup_mouse_top               Top at the mouse
                     popup_mouse_x                 Mouse X position
                     popup_mouse_y                 Mouse Y position
                     popup_pane_bottom             Bottom of the pane
                     popup_pane_left               Left of the pane
                     popup_pane_right              Right of the pane
                     popup_pane_top                Top of the pane
                     popup_status_line_y           Above or below the
                                                   status line
                     popup_width                   Width of menu or
                                                   popup
                     popup_window_status_line_x    At the window
                                                   position in status
                                                   line
                     popup_window_status_line_y    At the status line
                                                   showing the window

               Each menu consists of items followed by a key shortcut
               shown in brackets.  If the menu is too large to fit on
               the terminal, it is not displayed.  Pressing the key
               shortcut chooses the corresponding item.  If the mouse is
               enabled and the menu is opened from a mouse key binding,
               releasing the mouse button with an item selected chooses
               that item and releasing the mouse button without an item
               selected closes the menu.  -O changes this behaviour so
               that the menu does not close when the mouse button is
               released without an item selected the menu is not closed
               and a mouse button must be clicked to choose an item.

               The following keys are also available:

                     Key    Function
                     Enter  Choose selected item
                     Up     Select previous item
                     Down   Select next item
                     q      Exit menu

       display-message [-aIlNpv] [-c target-client] [-d delay] [-t
               target-pane] [message]
                     (alias: display)
               Display a message.  If -p is given, the output is printed
               to stdout, otherwise it is displayed in the target-client
               status line for up to delay milliseconds.  If delay is
               not given, the display-time option is used; a delay of
               zero waits for a key press.  ‘N’ ignores key presses and
               closes only after the delay expires.  If -l is given,
               message is printed unchanged.  Otherwise, the format of
               message is described in the “FORMATS” section;
               information is taken from target-pane if -t is given,
               otherwise the active pane.

               -v prints verbose logging as the format is parsed and -a
               lists the format variables and their values.

               -I forwards any input read from stdin to the empty pane
               given by target-pane.

       display-popup [-BCE] [-b border-lines] [-c target-client] [-d
               start-directory] [-e environment] [-h height] [-s
               border-style] [-S style] [-t target-pane] [-T title] [-w
               width] [-x position] [-y position] [shell-command]
                     (alias: popup)
               Display a popup running shell-command on target-client.
               A popup is a rectangular box drawn over the top of any
               panes.  Panes are not updated while a popup is present.

               -E closes the popup automatically when shell-command
               exits.  Two -E closes the popup only if shell-command
               exited with success.

               -x and -y give the position of the popup, they have the
               same meaning as for the display-menu command.  -w and -h
               give the width and height - both may be a percentage
               (followed by ‘%’).  If omitted, half of the terminal size
               is used.

               -B does not surround the popup by a border.

               -b sets the type of characters used for drawing popup
               borders.  When -B is specified, the -b option is ignored.
               See popup-border-lines for possible values for
               border-lines.

               -s sets the style for the popup and -S sets the style for
               the popup border (see “STYLES”).

               -e takes the form ‘VARIABLE=value’ and sets an
               environment variable for the popup; it may be specified
               multiple times.

               -T is a format for the popup title (see “FORMATS”).

               The -C flag closes any popup on the client.

       show-prompt-history [-T prompt-type]
                     (alias: showphist)
               Display status prompt history for prompt type
               prompt-type.  If -T is omitted, then show history for all
               types.  See command-prompt for possible values for
               prompt-type.

BUFFERS         top

       maintains a set of named paste buffers.  Each buffer may be
       either explicitly or automatically named.  Explicitly named
       buffers are named when created with the set-buffer or load-buffer
       commands, or by renaming an automatically named buffer with
       set-buffer -n.  Automatically named buffers are given a name such
       as ‘buffer0001’, ‘buffer0002’ and so on.  When the buffer-limit
       option is reached, the oldest automatically named buffer is
       deleted.  Explicitly named buffers are not subject to
       buffer-limit and may be deleted with the delete-buffer command.

       Buffers may be added using copy-mode or the set-buffer and
       load-buffer commands, and pasted into a window using the
       paste-buffer command.  If a buffer command is used and no buffer
       is specified, the most recently added automatically named buffer
       is assumed.

       A configurable history buffer is also maintained for each window.
       By default, up to 2000 lines are kept; this can be altered with
       the history-limit option (see the set-option command above).

       The buffer commands are as follows:

       choose-buffer [-NZr] [-F format] [-f filter] [-K key-format] [-O
               sort-order] [-t target-pane] [template]
               Put a pane into buffer mode, where a buffer may be chosen
               interactively from a list.  Each buffer is shown on one
               line.  A shortcut key is shown on the left in brackets
               allowing for immediate choice, or the list may be
               navigated and an item chosen or otherwise manipulated
               using the keys below.  -Z zooms the pane.  The following
               keys may be used in buffer mode:

                     Key    Function
                     Enter  Paste selected buffer
                     Up     Select previous buffer
                     Down   Select next buffer
                     C-s    Search by name or content
                     n      Repeat last search
                     t      Toggle if buffer is tagged
                     T      Tag no buffers
                     C-t    Tag all buffers
                     p      Paste selected buffer
                     P      Paste tagged buffers
                     d      Delete selected buffer
                     D      Delete tagged buffers
                     e      Open the buffer in an editor
                     f      Enter a format to filter items
                     O      Change sort field
                     r      Reverse sort order
                     v      Toggle preview
                     q      Exit mode

               After a buffer is chosen, ‘%%’ is replaced by the buffer
               name in template and the result executed as a command.
               If template is not given, "paste-buffer -b '%%'" is used.

               -O specifies the initial sort field: one of ‘time’
               (creation), ‘name’ or ‘size’.  -r reverses the sort
               order.  -f specifies an initial filter: the filter is a
               format - if it evaluates to zero, the item in the list is
               not shown, otherwise it is shown.  If a filter would lead
               to an empty list, it is ignored.  -F specifies the format
               for each item in the list and -K a format for each
               shortcut key; both are evaluated once for each line.  -N
               starts without the preview.  This command works only if
               at least one client is attached.

       clear-history [-H] [-t target-pane]
                     (alias: clearhist)
               Remove and free the history for the specified pane.  -H
               also removes all hyperlinks.

       delete-buffer [-b buffer-name]
                     (alias: deleteb)
               Delete the buffer named buffer-name, or the most recently
               added automatically named buffer if not specified.

       list-buffers [-F format] [-f filter]
                     (alias: lsb)
               List the global buffers.  -F specifies the format of each
               line and -f a filter.  Only buffers for which the filter
               is true are shown.  See the “FORMATS” section.

       load-buffer [-w] [-b buffer-name] [-t target-client] path
                     (alias: loadb)
               Load the contents of the specified paste buffer from
               path.  If -w is given, the buffer is also sent to the
               clipboard for target-client using the xterm(1) escape
               sequence, if possible.

       paste-buffer [-dpr] [-b buffer-name] [-s separator] [-t
               target-pane]
                     (alias: pasteb)
               Insert the contents of a paste buffer into the specified
               pane.  If not specified, paste into the current one.
               With -d, also delete the paste buffer.  When output, any
               linefeed (LF) characters in the paste buffer are replaced
               with a separator, by default carriage return (CR).  A
               custom separator may be specified using the -s flag.  The
               -r flag means to do no replacement (equivalent to a
               separator of LF).  If -p is specified, paste bracket
               control codes are inserted around the buffer if the
               application has requested bracketed paste mode.

       save-buffer [-a] [-b buffer-name] path
                     (alias: saveb)
               Save the contents of the specified paste buffer to path.
               The -a option appends to rather than overwriting the
               file.

       set-buffer [-aw] [-b buffer-name] [-t target-client] [-n
               new-buffer-name] data
                     (alias: setb)
               Set the contents of the specified buffer to data.  If -w
               is given, the buffer is also sent to the clipboard for
               target-client using the xterm(1) escape sequence, if
               possible.  The -a option appends to rather than
               overwriting the buffer.  The -n option renames the buffer
               to new-buffer-name.

       show-buffer [-b buffer-name]
                     (alias: showb)
               Display the contents of the specified buffer.

MISCELLANEOUS         top

       Miscellaneous commands are as follows:

       clock-mode [-t target-pane]
               Display a large clock.

       if-shell [-bF] [-t target-pane] shell-command command [command]
                     (alias: if)
               Execute the first command if shell-command (run with
               /bin/sh) returns success or the second command otherwise.
               Before being executed, shell-command is expanded using
               the rules specified in the “FORMATS” section, including
               those relevant to target-pane.  With -b, shell-command is
               run in the background.

               If -F is given, shell-command is not executed but
               considered success if neither empty nor zero (after
               formats are expanded).

       lock-server
                     (alias: lock)
               Lock each client individually by running the command
               specified by the lock-command option.

       run-shell [-bC] [-c start-directory] [-d delay] [-t target-pane]
               [shell-command]
                     (alias: run)
               Execute shell-command using /bin/sh or (with -C) a
               command in the background without creating a window.
               Before being executed, shell-command is expanded using
               the rules specified in the “FORMATS” section.  With -b,
               the command is run in the background.  -d waits for delay
               seconds before starting the command.  If -c is given, the
               current working directory is set to start-directory.  If
               -C is not given, any output to stdout is displayed in
               view mode (in the pane specified by -t or the current
               pane if omitted) after the command finishes.  If the
               command fails, the exit status is also displayed.

       wait-for [-L | -S | -U] channel
                     (alias: wait)
               When used without options, prevents the client from
               exiting until woken using wait-for -S with the same
               channel.  When -L is used, the channel is locked and any
               clients that try to lock the same channel are made to
               wait until the channel is unlocked with wait-for -U.

EXIT MESSAGES         top

       When a client detaches, it prints a message.  This may be one of:

       detached (from session ...)
               The client was detached normally.

       detached and SIGHUP
               The client was detached and its parent sent the SIGHUP
               signal (for example with detach-client -P).

       lost tty
               The client's tty(4) or pty(4) was unexpectedly destroyed.

       terminated
               The client was killed with SIGTERM.

       too far behind
               The client is in control mode and became unable to keep
               up with the data from .

       exited  The server exited when it had no sessions.

       server exited
               The server exited when it received SIGTERM.

       server exited unexpectedly
               The server crashed or otherwise exited without telling
               the client the reason.

TERMINFO EXTENSIONS         top

       understands some unofficial extensions to terminfo(5).  It is not
       normally necessary to set these manually, instead the
       terminal-features option should be used.

       AX      An existing extension that tells the terminal supports
               default colours.

       Bidi    Tell that the terminal supports the VTE bidirectional
               text extensions.

       Cs, Cr  Set the cursor colour.  The first takes a single string
               argument and is used to set the colour; the second takes
               no arguments and restores the default cursor colour.  If
               set, a sequence such as this may be used to change the
               cursor colour from inside :

                     $ printf '\033]12;red\033\\'

               The colour is an X(7) colour, see XParseColor(3).

       Cmg, Clmg, Dsmg, Enmg
               Set, clear, disable or enable DECSLRM margins.  These are
               set automatically if the terminal reports it is VT420
               compatible.

       Dsbp, Enbp
               Disable and enable bracketed paste.  These are set
               automatically if the XT capability is present.

       Dseks, Eneks
               Disable and enable extended keys.

       Dsfcs, Enfcs
               Disable and enable focus reporting.  These are set
               automatically if the XT capability is present.

       Hls     Set or clear a hyperlink annotation.

       Nobr    Tell that the terminal does not use bright colors for
               bold display.

       Rect    Tell that the terminal supports rectangle operations.

       Smol    Enable the overline attribute.

       Smulx   Set a styled underscore.  The single parameter is one of:
               0 for no underscore, 1 for normal underscore, 2 for
               double underscore, 3 for curly underscore, 4 for dotted
               underscore and 5 for dashed underscore.

       Setulc, Setulc1, ol
               Set the underscore colour or reset to the default.
               Setulc is for RGB colours and Setulc1 for ANSI or 256
               colours.  The Setulc argument is (red * 65536) + (green *
               256) + blue where each is between 0 and 255.

       Ss, Se  Set or reset the cursor style.  If set, a sequence such
               as this may be used to change the cursor to an underline:

                     $ printf '\033[4 q'

               If Se is not set, Ss with argument 0 will be used to
               reset the cursor style instead.

       Swd     Set the opening sequence for the working directory
               notification.  The sequence is terminated using the
               standard fsl capability.

       Sxl     Indicates that the terminal supports SIXEL.

       Sync    Start (parameter is 1) or end (parameter is 2) a
               synchronized update.

       Tc      Indicate that the terminal supports the ‘direct colour’
               RGB escape sequence (for example, \e[38;2;255;255;255m).

               If supported, this is used for the initialize colour
               escape sequence (which may be enabled by adding the
               ‘initc’ and ‘ccc’ capabilities to the terminfo(5) entry).

               This is equivalent to the RGB terminfo(5) capability.

       Ms      Store the current buffer in the host terminal's selection
               (clipboard).  See the set-clipboard option above and the
               xterm(1) man page.

       XT      This is an existing extension capability that tmux uses
               to mean that the terminal supports the xterm(1) title set
               sequences and to automatically set some of the
               capabilities above.

CONTROL MODE         top

       offers a textual interface called control mode.  This allows
       applications to communicate with using a simple text-only
       protocol.

       In control mode, a client sends commands or command sequences
       terminated by newlines on standard input.  Each command will
       produce one block of output on standard output.  An output block
       consists of a %begin line followed by the output (which may be
       empty).  The output block ends with a %end or %error.  %begin and
       matching %end or %error have three arguments: an integer time (as
       seconds from epoch), command number and flags (currently not
       used).  For example:

             %begin 1363006971 2 1
             0: ksh* (1 panes) [80x24] [layout b25f,80x24,0,0,2] @2 (active)
             %end 1363006971 2 1

       The refresh-client -C command may be used to set the size of a
       client in control mode.

       In control mode, outputs notifications.  A notification will
       never occur inside an output block.

       The following notifications are defined:

       %client-detached client
               The client has detached.

       %client-session-changed client session-id name
               The client is now attached to the session with ID
               session-id, which is named name.

       %config-error error
               An error has happened in a configuration file.

       %continue pane-id
               The pane has been continued after being paused (if the
               pause-after flag is set, see refresh-client -A).

       %exit [reason]
               The client is exiting immediately, either because it is
               not attached to any session or an error occurred.  If
               present, reason describes why the client exited.

       %extended-output pane-id age ... : value
               New form of %output sent when the pause-after flag is
               set.  age is the time in milliseconds for which tmux had
               buffered the output before it was sent.  Any subsequent
               arguments up until a single ‘:’ are for future use and
               should be ignored.

       %layout-change window-id window-layout window-visible-layout
               window-flags
               The layout of a window with ID window-id changed.  The
               new layout is window-layout.  The window's visible layout
               is window-visible-layout and the window flags are
               window-flags.

       %message message
               A message sent with the display-message command.

       %output pane-id value
               A window pane produced output.  value escapes non-
               printable characters and backslash as octal \xxx.

       %pane-mode-changed pane-id
               The pane with ID pane-id has changed mode.

       %paste-buffer-changed name
               Paste buffer name has been changed.

       %paste-buffer-deleted name
               Paste buffer name has been deleted.

       %pause pane-id
               The pane has been paused (if the pause-after flag is
               set).

       %session-changed session-id name
               The client is now attached to the session with ID
               session-id, which is named name.

       %session-renamed name
               The current session was renamed to name.

       %session-window-changed session-id window-id
               The session with ID session-id changed its active window
               to the window with ID window-id.

       %sessions-changed
               A session was created or destroyed.

       %subscription-changed name session-id window-id window-index
               pane-id ... : value
               The value of the format associated with subscription name
               has changed to value.  See refresh-client -B.  Any
               arguments after pane-id up until a single ‘:’ are for
               future use and should be ignored.

       %unlinked-window-add window-id
               The window with ID window-id was created but is not
               linked to the current session.

       %unlinked-window-close window-id
               The window with ID window-id, which is not linked to the
               current session, was closed.

       %unlinked-window-renamed window-id
               The window with ID window-id, which is not linked to the
               current session, was renamed.

       %window-add window-id
               The window with ID window-id was linked to the current
               session.

       %window-close window-id
               The window with ID window-id closed.

       %window-pane-changed window-id pane-id
               The active pane in the window with ID window-id changed
               to the pane with ID pane-id.

       %window-renamed window-id name
               The window with ID window-id was renamed to name.

ENVIRONMENT         top

       When is started, it inspects the following environment variables:

       EDITOR    If the command specified in this variable contains the
                 string ‘vi’ and VISUAL is unset, use vi-style key
                 bindings.  Overridden by the mode-keys and status-keys
                 options.

       HOME      The user's login directory.  If unset, the passwd(5)
                 database is consulted.

       LC_CTYPE  The character encoding locale(1).  It is used for two
                 separate purposes.  For output to the terminal, UTF-8
                 is used if the -u option is given or if LC_CTYPE
                 contains "UTF-8" or "UTF8".  Otherwise, only ASCII
                 characters are written and non-ASCII characters are
                 replaced with underscores (‘_’).  For input, always
                 runs with a UTF-8 locale.  If en_US.UTF-8 is provided
                 by the operating system, it is used and LC_CTYPE is
                 ignored for input.  Otherwise, LC_CTYPE tells what the
                 UTF-8 locale is called on the current system.  If the
                 locale specified by LC_CTYPE is not available or is not
                 a UTF-8 locale, exits with an error message.

       LC_TIME   The date and time format locale(1).  It is used for
                 locale-dependent strftime(3) format specifiers.

       PWD       The current working directory to be set in the global
                 environment.  This may be useful if it contains
                 symbolic links.  If the value of the variable does not
                 match the current working directory, the variable is
                 ignored and the result of getcwd(3) is used instead.

       SHELL     The absolute path to the default shell for new windows.
                 See the default-shell option for details.

       TMUX_TMPDIR
                 The parent directory of the directory containing the
                 server sockets.  See the -L option for details.

       VISUAL    If the command specified in this variable contains the
                 string ‘vi’, use vi-style key bindings.  Overridden by
                 the mode-keys and status-keys options.

FILES         top

       ~/.tmux.conf
       $XDG_CONFIG_HOME/tmux/tmux.conf
       ~/.config/tmux/tmux.conf   Default configuration file.
       @SYSCONFDIR@/tmux.conf     System-wide configuration file.

EXAMPLES         top

       To create a new session running vi(1):

             $ tmux new-session vi

       Most commands have a shorter form, known as an alias.  For new-
       session, this is new:

             $ tmux new vi

       Alternatively, the shortest unambiguous form of a command is
       accepted.  If there are several options, they are listed:

             $ tmux n
             ambiguous command: n, could be: new-session, new-window, next-window

       Within an active session, a new window may be created by typing
       ‘C-b c’ (Ctrl followed by the ‘b’ key followed by the ‘c’ key).

       Windows may be navigated with: ‘C-b 0’ (to select window 0), ‘C-b
       1’ (to select window 1), and so on; ‘C-b n’ to select the next
       window; and ‘C-b p’ to select the previous window.

       A session may be detached using ‘C-b d’ (or by an external event
       such as ssh(1) disconnection) and reattached with:

             $ tmux attach-session

       Typing ‘C-b ?’ lists the current key bindings in the current
       window; up and down may be used to navigate the list or ‘q’ to
       exit from it.

       Commands to be run when the server is started may be placed in
       the ~/.tmux.conf configuration file.  Common examples include:

       Changing the default prefix key:

             set-option -g prefix C-a
             unbind-key C-b
             bind-key C-a send-prefix

       Turning the status line off, or changing its colour:

             set-option -g status off
             set-option -g status-style bg=blue

       Setting other options, such as the default command, or locking
       after 30 minutes of inactivity:

             set-option -g default-command "exec /bin/ksh"
             set-option -g lock-after-time 1800

       Creating new key bindings:

             bind-key b set-option status
             bind-key / command-prompt "split-window 'exec man %%'"
             bind-key S command-prompt "new-window -n %1 'ssh %1'"

SEE ALSO         top

       pty(4)

AUTHORS         top

       Nicholas Marriott <nicholas.marriott@gmail.com>

COLOPHON         top

       This page is part of the tmux (terminal multiplexer) project.
       Information about the project can be found at
       https://tmux.github.io/.  If you have a bug report for this
       manual page, send it to tmux-users@googlegroups.com.  This page
       was obtained from the project's upstream Git repository
       ⟨https://github.com/tmux/tmux.git⟩ on 2023-12-22.  (At that time,
       the date of the most recent commit that was found in the
       repository was 2023-11-14.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

GNU                            $Mdocdate$                        TMUX(1)

Pages that refer to this page: logind.conf(5)user_caps(5)pty(7)