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If I'm working in a widescreen monitor I like to primarily use two panes and switch between them with C-a Ca.
If I'm working on a square monitor I'll use two windows. I'd like to be able to switch between them with C-a C-a as well without changing my tmux.conf.
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Reload tmux, switch windows at least once and press: ctrl+B (default prefix) + l (lower-case L) works like a charm!
Tmux uses the keybinding 'Prefix' followed by 'Ctrl+o' to cycle around the panes. When you use this key-binding for the first time, it moves the pane in one position clockwise.
By default, tmux sets the prefix key as Ctrl + b.
ctrl + b + % to make a vertical split. ctrl + b + " to make a Horizontal split. ctrl + b + left arrow to move to the left pane. ctrl + b + " to make a Horizontal split.
If you always want C-a to
then you can use an if-shell that counts the number of panes in the active window to decide between last-pane and last-window:
bind-key C-a if-shell 'test $(tmux list-panes | wc -l) -gt 1' 'last-pane' 'last-window'
It will still be “up to you” to rearrange your panes when switching between “wide” and “square” configurations (e.g. via break-pane and join-pane).
In tmux 1.8 if-shell and run-shell do format expansion, so you can simply the shell command a bit:
bind-key C-a if-shell 'test #{window_panes} -gt 1' 'last-pane' 'last-window'
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