CHANGES FROM 2.3 to 2.4 20 April 2017

Incompatible Changes
====================

* Key tables have undergone major changes. Mode key tables are no longer
separate from the main key tables. All mod

CHANGES FROM 2.3 to 2.4 20 April 2017

Incompatible Changes
====================

* Key tables have undergone major changes. Mode key tables are no longer
separate from the main key tables. All mode key tables have been removed,
together with the -t flag to bind-key and unbind-key.

The emacs-edit, vi-edit, emacs-choose and vi-choose tables have been replaced
by fixed key bindings in the command prompt and choose modes. The mode-keys
and status-keys options remain.

The emacs-copy and vi-copy tables have been replaced by the copy-mode and
copy-mode-vi tables. Commands are sent using the -X and -N flags to
send-keys. So the following:

bind -temacs-copy C-Up scroll-up
bind -temacs-copy -R5 WheelUpPane scroll-up

Becomes:

bind -Tcopy-mode C-Up send -X scroll-up
bind -Tcopy-mode WheelUpPane send -N5 -X scroll-up

This changes allows the full command parser (including command sequences) and
command set to be used - for example, the normal command prompt with editing
and history is now used for searching, jumping, and so on instead of a custom
one. The default C-r binding is now:

bind -Tcopy-mode C-r command-prompt -p'search up' "send -X search-backward '%%'"

There are also some new commmands available with send -X, such as
copy-pipe-and-cancel.
* set-remain-on-exit has gone -- can be achieved with hooks instead.
* Hooks: before hooks have been removed and only a selection of commands now
have after hooks (they are no longer automatic). Additional hooks have been
added.
* The xterm-keys option now defaults to on.

Normal Changes
==============

* Support for mouse double and triple clicks.
* BCE (Background Colour Erase) is now supported.
* All occurrences of a search string in copy mode are now highlighted;
additionally, the number of search results is displayed. The highlighting
updates interactively with the default emacs key bindings (incremental
search).
* source-file now understands glob patterns.
* Formats now have simple comparisons:

#{==:a,b}
#{!=:a,b}

* There are the following new formats:

- #{version} -- the tmux server version;
- #{client_termtype} -- the terminal type of the client;
- #{client_name} -- the name of a client;
- #{client_written} -- the number of bytes written to the client.

* The configuration file now accepts %if/%endif conditional blocks which are
processed when it is parsed; the argument is a format string (useful with the
new format comparison options).
* detach-client now has -E to execute a command replacing the client instead of
exiting.
* Add support for custom command aliases, this is an array option which
contains items of the form "alias=command". This is consulted when an
unknown command is parsed.
* break-pane now has -n to specify the new window name.
* OSC 52 support has been added for programs inside tmux to set a tmux buffer.
* The mouse "all event" mode (1003) is now supported.
* Palette setting is now possible (OSC 4 and 104).
* Strikethrough support (a recent terminfo is required).
* Grouped sessions can now be named (new -t).
* terminal-overrides and update-environment are now array options (the previous
set -ag syntax should work without change).
* There have been substantial performance improvements.

CHANGES FROM 2.2 to 2.3 29 September 2016

Incompatible Changes
====================

None.

Normal Changes
==============

* New option 'pane-border-status' to add text in the pane borders.
* Support for hooks on commands: 'after' and 'before' hooks.
* 'source-file' understands '-q' to suppress errors for nonexistent files.
* Lots of UTF8 improvements, especially on MacOS.
* 'window-status-separator' understands #[] expansions.
* 'split-window' understands '-f' for performing a full-width split.
* Allow report count to be specified when using 'bind-key -R'.
* 'set -a' for appending to user options (@foo) is now supported.
* 'display-panes' can now accept a command to run, rather than always
selecting the pane.

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CHANGES FROM 2.1 to 2.2 10 April 2016

Incompatible Changes
====================

* The format strings which referenced time have been removed. Instead:

#{t:window_activity}

can be used.

* Supp

CHANGES FROM 2.1 to 2.2 10 April 2016

Incompatible Changes
====================

* The format strings which referenced time have been removed. Instead:

#{t:window_activity}

can be used.

* Support for TMPDIR has been removed. Use TMUX_TMPDIR instead.
* UTF8 detection how happens automatically if the client supports it, hence
the:

mouse-utf8
utf8

options has been removed.
* The:

mouse_utf8_flag

format string has been removed.
* The -I option to show-messages has been removed. See:

#{t:start_time}

format option instead.

Normal Changes
==============

* Panes are unzoomed with selectp -LRUD
* New formats added:

#{scroll_position}
#{socket_path}
#{=10:...} -- limit to N characters (from the start)
#{=-10:...} -- limit to N characters (from the end)
#{t:...} -- used to format time-based formats
#{b:...} -- used to ascertain basename from string
#{d:...} -- used to ascertain dirname from string
#{s:...} -- used to perform substitutions on a string

* Job output is run via the format system, so formats work again
* If display-time is set to 0, then the indicators wait for a key to be
pressed.
* list-keys and list-commands can be run without starting the tmux server.
* kill-session learns -C to clear all alerts in all windows of the session.
* Support for hooks (internal for now), but hooks for the following have been
implemented:

alert-bell
alert-silence
alert-activity
client-attached
client-detached
client-resized
pane-died
pane-exited

* RGB (24bit) colour support. The 'Tc' flag must be set in the external TERM
entry (using terminal-overrides or a custom terminfo entry).

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