I'd like to have the standard Emacs key binding \C-/ for undo in zsh as well. However on Mac using Terminal.app, this keybinding doesn't seem to be transmitted. It will just beep, and
read doesn't translate it to a escape sequence.
In Preferences/Keyboards you can add sequences, but the list is fixed and you can't select \C-/ (and \C-;, \C-, etc. Is there a way out?