Plz watch this video from 6:00~6:22 ! I wanted to make an ios7's transparent navigation bar, so i found this video. In the video, he made a shape mask with only dragging the shape layer to another layer. I couldn't do the same thing as him with my computer, I tried to do that though. When i kept pressing 'alt' and dragged a shape layer to another one, it didn't work at all. It was only duplicated itself. Then, how can i make a linked layer or a shape layer like in the video?
On a PC, before clicking on the shape mask you need to hit the Ctrl+Alt, and then drag the shape onto the layer you want to mask.
On Mac, it's Command+Option key, and then drag the shape layer onto the one you want to mask.