Could you get the key event generated by that key with xev and copy it to a comment?
** Changed in: control-center (Ubuntu) Importance: Medium => Low Assignee: (unassigned) => Ubuntu Desktop Bugs -- Keyboard Shortcuts Dialog Box should expand Support https://launchpad.net/bugs/29052 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs