The behavior is governed by the repeat-time option:Īllow multiple commands to be entered without pressing the prefix-key again in the specified time milliseconds (the default is 500). Changing 600 ms to 400 ms in the system-wide keyboard settings allows me to use prefix Ctrl ↓ (hold). with the average interval of 40 ms, which is good enough for tmux. Then there will be 25 repeats per second, i.e. in my Kubuntu the initial delay is 600 ms, which is higher than the default threshold of 500 ms used by tmux, therefore holding ↓ doesn't work by default. If it doesn't work then it means tmux does not receive the second (or later) ↓ soon enough. Holding ↓ instead of striking it repeatedly may or may not work.

Thanks to -r you can do prefix Ctrl ↓ ↓ ↓… without repeating prefix many times, if you strike ↓ fast enough. This means you can resize a pane by prefix Alt ← or prefix Ctrl ↓ etc. By default these bindings (among others) are active: bind-key -r -T prefix M-Up resize-pane -U 5īind-key -r -T prefix M-Down resize-pane -D 5īind-key -r -T prefix M-Left resize-pane -L 5īind-key -r -T prefix M-Right resize-pane -R 5īind-key -r -T prefix C-Up resize-pane -Uīind-key -r -T prefix C-Down resize-pane -Dīind-key -r -T prefix C-Left resize-pane -Līind-key -r -T prefix C-Right resize-pane -R

Tmux windows