@b0rk Fun trivia on the Ctrl-1 and Ctrl-M and so on thing: non-terminal graphical programs with direct access to keypress information can bind them (of course). This is especially fun for programs that can operate either in the terminal or as stand-alone graphical applications, like GNU Emacs, because you can innocently create a binding for yourself that only works in GUI mode (which you might not notice for a while if you only rarely use the editor in a terminal).