Cannot create some specific keyboard shortcuts (Shift + F4) I want to reuse some common keyboard shortcut in Ubuntu. The first one is ⇧ Shift+F4 (to open terminal), the second one is ⌃ Control+Shift (to change input source). However, the  system preference seems to prevent me from using such special combinations. Is there a way to bypass this?
It will let you use Shift/F4*, assuming you have a service you can apply it to that will launch Terminal, but it won't let you use ctrl/shift without some further character.

*Also assuming you have Fkey set to be Fkeys &amp; not 'convenience shortcuts' - set in System Prefs > Keyboard > Keyboard, otherwise you'll have to add Fn.