Home » Tip of The Day » Locking Layer TransparencyLocking Layer Transparency June 16, 2016. Posted in: Tip Of The Day. When on a layer, tap the / key to toggle the Lock Transparency option on and off. If you’re on a Shape layer, tapping the / key will toggle the Lock position option on and off. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: