After doing join-pane on 2 windows, you have 2 horizontal panes. How do I rearrange the panes to be vertical panes instead?
C-b space (bound to
next-layout by default) cycles through available layouts, you can also use the
M-1 to M-5 Arrange panes in one of the five preset layouts: even- horizontal, even-vertical, main-horizontal, main- vertical, or tiled.
On OS X,
man tmux for more details.
In Mac OS Yosemite, this works:
Prefix + Option-[1-5]
e.g: Ctrl-b Option-1
You should be able to use:
to do this, but I'm unable to test it since OS X doesn't like anything too "meta" (we have at least that in common).
There are also an options for explicitly requiring the join/split to happen vertically/horizontally:
(see man page and note that the -h/-v do not refer to the direction of the separator line).