It's looks like that this is a mutter thing. If I understand that correctly from a short gsettings dig, you can set only one key as overlay-key, not a combo, not several separate keys.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1880411 Title: Settings > Language and Region keyboard preview mislabels the compose/menu key as "Super R" Status in gnome-control-center package in Ubuntu: New Bug description: Settings > Language and Region keyboard preview mislabels the compose/menu key as "Super R". Ubuntu 20.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1880411/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp