Create clipping mask

To create a clipping mask:
  1. Arrange the layers in the Layers palette so that the base layer is below the layer that you want to mask.
  2. Do one of the following:
    • Choose Layer ‣ Create Clipping Mask...
    • Press Option ⌥ + Command ⌘ + G
    • Option ⌥-click between layers in Layers palette.