I use byobu+tmux in iTerm2, I found that keyshorts for resizing panes is M-S-Up/Down/Left/Right but when I press then I just got character typed like this:

I use byobu+tmux in iTerm2, I found that keyshorts for resizing panes is M-S-Up/Down/Left/Right but when I press then I just got character typed like this:
