Might be a pretty dumb question, but I just can't seem to figure it out.

I want to change my hotbar 3 to where you have to press a combination of F + [a number]. Kinda like how hotbar 2 is by default set up with Ctrl. The keybinding menu in the game won't let me do F+1, F+2, F+3, etc., so I have no idea how to do this.

I found all kinds of pictures of other peoples' UI setups on the internet where they will have hotbar 2 on the A key, hotbar 3 on the Q key... but no where could I find how to exactly to set that up.