Photoshop: How do I combine two layer masks into one?

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  • Updated 2 years ago
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Dear Adobe Gripe #504

"please let me join two layer masks onto one"
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Photoshop FAQ, Official Rep

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Posted 7 years ago

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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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You can do this using Image>Calculations...

In the example below, I'm blending Shape Layer 3's mask with Shape Layer 4's mask using the 'multiply' blend mode:

You can have the result be new channel (or document) that you copy/paste to a mask, or a selection, that you can use to fill a mask.
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Brett N, Official Rep

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Additionally, if you hold the Control (Command) key and click on the Mask icon in the Layers panel, this will make a selection of mask. If you then hold Shift+Control (Command) and click on the second Mask icon, this will make a single selection of the two Masks. You can then apply this selection as a new mask.