A key to hide the tooltip

Hi,

is there a key to hide the tooltip. Want to see which gems work together but the tooltip dont let me see this.

Pls help :)

Iirc, when you have the gem in your inventory and hover over it, it shows you which gems it supports based on what is in your gear.
there should show a green checkmark if it is good.
Can't check from work, but I think that is how it works.