This is still a work in progress. It's a good start but there might be some bumps
Borders and titles can be added to tmux panes. I find the titles especially useful for keeping track of what things are in each pane.
Here's what I'm using currently. (which includes changing the border line style and setting the colors)
set -g pane-border-status top set -g pane-border-lines double set -g pane-border-style fg=#447755 set -g pane-active-border-style fg=#447755 set -g pane-border-format " #(echo 'hello world') "
It looks like env vars work too (e.g. `$HOME``)
However, I was trying to get `$PWD`` to work and it's not. On my mac running macOS 12.x it sticks with the directory I opened tmux in.
See also: 2szwu3lo