mac os x byobu vertical split using iTerm, tmux, zsh
Solution 1:
You can use screen escape key to do that:
Ctrl + A and then % for vertical split or | for horizontal split.
For whole list: Ctrl + A and after that ?.
Solution 2:
Ctrl + F2 is associated to Mac shortcut 'Move focus to the menu bar'. That might be why it is not working for you.
Solution 3:
You can also use shift + the arrow keys.
- left and right for vertical splits, and
- up and down for horizontal splits.