How do Quickslots work?

Hello,

EDIT: I’ve answered my own questions. For those that might be interested. Quickslots are covered on Pg 4 in the box titled Upgrade Cards. Potions can be used as a free action, it says it on their upgrade card!

I’m trying to understand how quickslot equipped items work. Is it as simple as you can use quick slot items without first needing to spend an action to equip them?

Follow up question, potions are quickslot items but are they a “free action” to consume? I’m certain I read that they are free to use (in terms of action points) but I can’t find the reference in the book.

Many thanks,
Dave