Home » Tip of The Day » Flatten All Layer Masks At OnceFlatten All Layer Masks At Once November 22, 2016. Posted in: Tip Of The Day. If you want to flatten all layer masks at once, go to File > Scripts > Flatten All Masks. This is a destructive action so make sure you really want to do this before running this script. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address:
