Can't select summoning theme

[Luke Danger]

I've been trying out a new spellcaster, but I can't select a summoning theme from the summoning table in the Start area, is there a reason for this?

Playing a Generalist wizard with Spell Focus: Conjurjuction when I realized this. Been aiming for the Earth summoning theme.


Edit: Ignore, I found out it was because generalists can't pick a summoning theme