Unbind F12?

[TontonDACK]

I read the guide to reactivate achievement and use it, but i still have the move to use F12 for take screenshoot, even if i have change the key anddsometimes i have the message that say me console reactivated cant have achievments.
There is no way to unbind F12 with the console to keep F12 as screenshoot, or when i'm taking pictures am i need to restart the game.

(sorry for my english it's not may native language)