I called the factory and the guy that answered the phone was less than helpful. I couldn't get a word in edgewise. I was told how to do it and the phone call was over. It appears the turrets have a small notch where a fine screwdriver is inserted into. I tried it and it wouldn't move and I don't know how much upward pressure can be applied. With my luck, I would keep pushing into something broke. YouTube was no help either. Help! The instructions that came with the scope also offer no real help.