There was a time when I knew a few screen/tmux bindings but I'm afraid that's been relegated to history. For years now I've used tmux in concern with iterm2 so everything I do is with a mouse/trackpad.
But flipping between full screen apps is probably where I need to be so I'll check it out. I appreciate the suggestion.
The bindings are pretty simple like screen/tmux.
It's quite bare and simple.
An advantage for low vision of tiling WMs like ratpoison is that you can keep all applications full screen and flip between them very fast.