#5179·tmux

3.7c questions and comments

Author: nicmCreated Jun 8, 2026Updated Sep 17, 2026

This issue is for quick questions or comments about tmux 3.7. Please do not use this issue for bug reports, they will be ignored - for bug reports open a new issue with full information, see CONTRIBUTING.

Note that it is very important to restart tmux entirely after upgrading.

tmux 3.7 has many additions, improvements and bug fixes; most are listed in the 3.7c CHANGES file. Many thanks to everyone who contributed and apologies to anyone who has been missed.

A few of the more notable new features are:

  • Initial support for floating panes. These are panes which sit above the layout, like popups except not modal. Open a floating pane with C-b * or new-pane. These were mostly written by Michael Grant. Note that floating panes work but have a number of missing features in this release (many of which are completed now in master).

  • Support for line numbers in copy mode (from Leo Henon). Use the copy-mode-line-numbers option.

  • "Control" ranges in styles and clickable controls in the default pane-border-status (from Dane Jensen).

  • Additional sort orders and sorting for list-keys and other commands (from Dane Jensen).

  • A focus-follows-mouse option (from Barry Wasdell).

  • A get-clipboard to configure tmux to fetch the clipboard from the terminal when requested from a pane.

  • Change message-style so that the message honours the fill attribute and can be set to take up only part of the line (the default message-style now includes fill=yellow).

  • Add a short builtin help text for each mode accessible with C-h (from Patrick Motard).

  • Some improvements to mode-keys vi so it works more like vi(1).

3.7a and 3.7b fix a couple of problems with the 3.7 release, most notably a crash with break-pane.

3.7c fixes another couple of small problems and also changes to require jemalloc on macOS in order to work around a bug in the macOS calloc function.

The issue for the previous 3.6b release is here.