Episode Summary 
This tip will show you how to copy a layer mask from one layer to another and how to invert the values of that mask.
Photoshop Killer Tips: Copy and Invert a Layer Mask
This tip will show you how to copy a layer mask from one layer to another and how to invert the values of that mask.
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I read a article under the same title some time ago, but this articles quality is much, much better. How you do this?
Thanks for the tip, this is fantastic. My use case:
Trying to add noise to a transparent background.
Thanks! I knew there was a quick way to invert a mask!