I bought the perk where if I press block while aiming an arrow, it zooms. but it does not.

I assume block is right mouse. what am I doing wrong?

well I am playing on PS3, but what you are suppose to do is pull back the arrow by aiming, then press block which zooms you in.... if you just press block it will do the archer melee ability

I am PC. I press left mouse, and an arrow is notched. I press right mouse...NO ZOOM. I see the perk is bought.

EDIT: dope! I had highlighted the perk but not bought it. der der der.