I'm using PuTTY to ssh into a Debian machine. When I try to use Ctrl + [arrow key] to resize panes in tmux, the active pane just switches as if I was not holding Ctrl. Other Ctrl key shortcuts work fine. When I try the same thing using a different terminal, the shortcut works.
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2 Answers
Add the following line to ~/.tmux.conf
set -g terminal-overrides "xterm*:kLFT5=\eOD:kRIT5=\eOC:kUP5=\eOA:kDN5=\eOB:smkx@:rmkx@"
Source: https://stuff.mit.edu/afs/athena/project/bsd/src/tmux-1.3/FAQ
Ctrl and arrow keys doesn't work in putty! What do I do?
putty inverts the sense of the cursor key mode on ctrl, which is a bit hard for tmux to detect properly. To get ctrl keys right, change the terminfo settings so kUP5 (Ctrl-Up etc) are the adjusted versions, and disable smkx/rmkx so tmux doesn't change the mode. For example with this line in .tmux.conf (assuming you have TERM set to xterm):
set -g terminal-overrides "xterm*:kLFT5=\eOD:kRIT5=\eOC:kUP5=\eOA:kDN5=\eOB:smkx@:rmkx@"
Note that this will only work in tmux 1.2 and above.
answered Jan 10, 2017 at 15:44
Ctrl+b then release both and then Ctrl+arrow key to adjust size(holding Ctrl press fast multiple times arrow if needed)
Make sure that you don't have a long pause between pressing, otherwise it will resize just one step at time
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Pause between
Ctrl+band subsequentCtrl+arrow keymust be as short as possible, (I think it a second, no more). This bothered me too until I found that it need to be entered pretty fast– AlexCommented Jan 10, 2017 at 15:36 -
1Using Putty 0.69 on Windows and tmux 2.1 on Ubuntu 16.04, Ctrl + Arrow is just detected the same as arrow without Ctrl. Setting the terminal overrides as suggested in the other answer fixes things.– bobpaulCommented Jun 20, 2017 at 17:20