Can I remap F keys and use shortcuts for F keys?

Configuration Help & General Discussion
1

Hi, I've remapped F keys to Switch to Desktop 1,2,3... I like to separate the context between desktops and it's been great. However, I need to use F keys for certain things and I can't seem to use any modifier keys because the modifier keys are also detected. For example:

F1 → Switch to Desktop 1
Shift + fn + Brightness Up → F1 (This gets detected as Shift + F1)

Thanks!

Update: I noticed "Included currently pressed modifier keys" and I tried toggling it on and off. They both get detected as Shift + F1.