I haven't been able to find this anywhere..but is there a way to assign keybinds to the other hotbars outside the first 3?
Like "CTRL+SHIFT+1" on hotbar 4 in slot 1?

I've seen a way to rotate out hotbars, so perhaps I need to look in that direction.

Edit- I was also wondering if there are training dumies (or something like them) to test out spell macros?