Ubuntu 16.04 only gives me the following options to use as a compose key (under System Settings > Keyboard > Typing):

  • Disabled
  • Right Alt
  • Right Ctrl
  • Right Win
  • Left Ctrl
  • Menu
  • Caps Lock

Is there any way I could use Left Alt as my compose key (Menu is not it apparently)?


1 Answer 1


I don't think so. XKB provides a few more options; you can view them by running this command:

cat /usr/share/X11/xkb/rules/evdev.lst | grep compose

But Left Alt is not one of them.


There may be a xmodmap way to fix it; please see DK Bose's comments.

  • 1
    Please see my comment to the question. Those links may provide a general solution.
    – DK Bose
    Apr 11, 2019 at 10:24
  • @DKBose: I edited the answer and mentioned it. Apr 11, 2019 at 13:05

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