Im getting frustrated... I definitely think this shouldn't be so hard. But here I am hours later and no real solution.
All I want is to display a text banner in top pane. The bottom pane will be a menu and execute code. The idea is so the top pane only gets written once, and bottom pane cycles through code.
Remain-on-close is not useful, as it shows pane dead on bottom of pane. Watch kinda messes it up entirely.
tmux new-session -d -s Villainy 'bash ~/Transfer/Banner.sh'
tmux set -g status off
tmux split-window -l 5
tmux send 'bash ~/Transfer/Menu.sh' ENTER