ToME: the Tales of Maj'Eyal

Hi!
I know it may be a dumb question, but how do I unlock extra slot for infusions/runes? I know that it can be done by using a category point at lev 10, 20 and 30, but... I don't see it! I can unlock new talent tree or improve some old one - there is no option to for extra slot. Or maybe I'm blind

You get the option to do it when you try to add a new rune/infusion. The list shows the existing ones to replace or lets you choose to make a new slot with a category point.

Thank you!

BTW, this should definitely be changed. It's very unclear that there can be more than 3 slots for infusion/runes and for some players it can be confusing. It would be much better with additional button/option on character screen.

Moved to ideas...

I suppose, it could be easliy done, by adding extra skill tree for every character. This "Slot" tree, should have no skills, only option to raise it's level by spending a category point.