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.
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).