upgrading 17.10 to 18.04 I stupidly set a keyboard shortcut for switching input languages to Left Ctrl, and it messed up copy paste Ctrl+C, Ctrl+V, now they work with Right Ctrl, which is highly inconvenient.
I tried to fix it in keyboard settings, but I can't see either of those 3 positions (neither 'alternative switch to next source' - changes input language, nor copy or paste to clipboard) on the list so can't change it there.
I suppose I would need it to fix it manually, but I don't know what command to type in.
as on the screen below 2nd position says command.
So do you know how could I change it back? Do I need to add it manually if it's not on the list of shortcuts in settings->keyboard? If yes what command to use?
Would be very glad for help.