How can I set custom variables in tmux?

Question

I have the following section in my tmux.conf file:

bind -r H resize-pane -L 10 # defaults to Ctrl-LeftArrow
bind -r J resize-pane -D 10
bind -r K resize-pane -U 10
bind -r L resize-pane -R 10

Id like to set a custom variable called step and assign it to 10 so I can reference it as:

bind -r H resize-pane -L $step

I don't know how to do that in tmux configuration file, but I think it should be possible.

Answer 1

Place this line in your config:

TMUX_STEP=10

And use it as such:

bind -r H resize-pane -L $TMUX_STEP