To create a mask on a layer based on the transparency of another layer, in the Layers panel, select the layer that you want the mask to be added to. Then, drag the layer that you want to become the contents for the mask to the Add Mask Icon at the bottom of the Layers panel. Important: don’t click and release the mouse on the layer that you want to become the contents of the mask – clicking will select the layer, you need to drag that layer instead.
Posts tagged "Transparency"
In order to automatically convert the transparent areas of a layer into a mask, select Layer > Layer Mask > From Transparency.
Option-Delete (Mac) / Alt-Backspace (Win) + Shift will fill with the currently selected history state and preserve transparency (so that only those pixels that have information in them are filled).
When on a layer, tap the “/” key to toggle the Lock (Transparency, Pixels, Position, or All) option on and off.