Re-Mask (Replace Mask)
Re-Mask is a simple tool built into the panel that allows you to replace the current mask you have on a layer with any loaded selection.
From time to time when you’re working with layers and layer masks in Photoshop you will create a mask on a layer that you want to replace. This is a fairly straight forward process to complete manually but it does take a few steps. This button allows you to replace the mask quickly on any layer with any loaded selection.
It’s not limited to Adjustment Layers, you can replace a mask on any layer including groups and image layers.
The video below will show how to use the Re-Mask tool in more detail.