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Source: Adobe PhotoShop CS3 Help
- Step 1: Open a picture you want to use in a
clipping mask
- Using the shape tool, create a new layer and draw a
shape to fill the layer (note: you can use your logo, words, etc.
for the mask. Think of the mask as the part you will see of the
picture in the layer above.
- Arrange the layers in the Layers palette so that
the base layer with the mask is below the layers that you want to mask.
- Do one of the following:
 | Hold down Alt (Windows) or Option (Mac OS), position the pointer
over the line in the Layers palette dividing the base layer and the
first layer above it that you want to include in the clipping mask (the
pointer changes to two overlapping circles ),
and click. |
 | Select the first layer above the base layer in the Layers palette,
and choose Layer > Create Clipping Mask. |
- To add additional layers to the clipping mask, use
either method in step 2, and work your way upward one level at a time in
the Layers palette.
Note: If you create a new layer between
layers in a clipping mask, or drag an unclipped layer between layers
in a clipping mask, the layer becomes part of the clipping mask.
Layers in the clipping mask are assigned the opacity and mode
attributes of the base layer.
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