I'm using spacemacs but trying to use ediff-regions-linewise to compare a couple regions of text. In order to confirm the selection, I need to do C-M-c.

This is probably a silly question, but how do I actually do C-M-c? I assume M is meta, but when I hold control and escape I get a <c-escape> is undefined. As a sanity check, holding control and the character M doesn't work either (selects the next line). Maybe this is a spacemacs issue because of remapped keybindings, but how do I do this in spacemacs?

  • 1
    M does stand for Meta, but this is usually the Alt key (at least on linux and in Windows). Does that work? (I don't use spacemacs, just regular emacs, so I don't know for sure, but that's what I'd try first.)
    – MTS
    Jul 10, 2019 at 17:10
  • @MTS ah yeah you're right, Ctl + Alt + c works. Jul 11, 2019 at 14:00

1 Answer 1


When you're using ESC for Meta, you want to type it separately, as a prefix.

So on most keyboards you could use either:

  • ESCCtrl + c
  • Ctrl + Alt + c

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