A clipping mask is a shape that uses the content and transparency of one layer to control the visibility of another layer. In other words a layer can define the visible boundaries of layers above it, if they are “clipped” together. All you need is a shape and something to attach (clip) to it.
In digital scrapbooking, the shape is usually (but not always) a black PNG file to which you would clip a photograph or a digital paper.
There are two important rules for using clipping masks:
- Rule 1: A mask layer is always placed beneath the photo or paper or other element that is going to be clipped to it.
- Rule 2: The photo (or paper or other element) must be larger that the mask.
- You can only clip only successive layers.
- The name of the base layer to which other layers are group will always be underlined.
- The thumbnails for the layers that are clipped to the base will always be indented and will display the clipping mask icon.
Using a Mask
The process for using “clipping masks” is the same in Photoshop and Photoshop Elements:
- Begin by dragging a photo over the mask.
- Make sure that the photo layer is directly above the mask layer. If it isn’t, use the Move tool to drag the layer directly above the mask layer.
- The photo must be large enough to completely cover the mask. Use the corner handles to resize either the photo if necessary.
- With the photo in place, move your cursor between the photo layer and the mask layer. Press the Alt key (Mac: Opt key) on your keyboard. As you do this, your cursor changes to a double-circle arrow. When this occurs, click once. The photo will take the shape of the mask or layer beneath it.
When you are satisfied with how the layers are clipped together, select all of the clipped layers and click the little chain to the left of one of the layers to “link” the layers so that they move together if you need to reposition. Or, press Ctrl E (Mac: Cmd E) to merge the two layers together.
- You can use digital papers or textures to clip to your mask, not just a photo and then have fun experimenting with the blend mode and opacity of the paper (or photo) layer to create different effects. In the sample photo, I have clipped a paper (top layer) to a photo layer that is clipped to the mask shape.
- Try using some of Photoshop’s/Elements built-in shapes as a mask — there are lot of fun shapes available. The Custom Shape Tool is located in the Draw section of the Tools bar in Photoshop Elements and is nested with the Rectangle Tool in the full version of Photoshop.