Moment of shame. I don't understand terminal multiplexers. I just open a new terminal and SSH in again if need be. Keyboard shortcuts to arrange the windows.
Main feature for me is that I can have a few terminal windows/panes open, close the terminal, and open it back up later to the same tabs and panes still running. Or, I can open a terminal on any virtual desktop and get the same terminal on all of them.
I work with a few different hosts on SSH and having an active connection for each as a labelled window (tab) in the terminal itself that I can just open up a terminal anywhere to come back to is great.
Personally I use the `tmuxinator` helper tool[^1] that allows you to create configurations as json files to be launched/attached to with short aliases (eg `mux s myconfig`)