I really wish that the spell slots on a character sheet worked the same way weapon sets do ... surely I am not the only one, right? What I mean is, even if I have an empty slot for an unprepared spell, I cold drag that empty slot to my hotbar - much like you can for choosing a weapon set in which there are no weapons being wielded. That way, we have the option of putting not the individual spell but the spell slot on our hotbar ... would save a lot of fuss - at least for me - anytime I change out spells on my wizzie.