I had the same problem and none of the answers provided here worked. That is, I too had the iTerm2 [Option]
key remapped to [+Esc]
(aka. "fallback"-[META]
) in my "Preferences -> Profiles -> Keyboard", as described in the other answers, but still could not change my tmux pane layout with [CTRL]-[b]
, [+Esc/META]-[DIGIT]
.
Then I found that under "Preferences -> Keys", there is a "Navigation Shortcuts" where [Option]
+ (any) [DIGIT]
is mapped to "switch split panes" (remember [Option]
is remapped to [+Esc]
, so that's a clear collision). Therefore, after un-setting that (to an empty key value), I finally can again comfortably resize my tmux panes with [CTRL]-[b]
, [+Esc/META]-[DIGIT]
(instead of having to use [CTRL]-[b]
, (the real) [Esc]
, and then the desired layout [DIGIT]
).
^b Space
with cycle through the various layouts – caspyin – 2014-03-22T14:03:54.127