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I'd like to have the standard Emacs key binding \C-/ for undo in zsh as well. However on Mac using, this keybinding doesn't seem to be transmitted. It will just beep, and cat/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?

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OK, I switched to iterm2 where it works.

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Please make sure to mark your answer as the accepted answer once enough time has passed to do so. If you have any other information about how you solved the problem, please do edit this answer! Thanks. – nhinkle Jul 13 '11 at 23:19

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