by Julieanne Kost
To customize Photoshop’s keyboard shortcuts to add a layer mask, select Edit > Keyboard Shortcuts. Set the “Shortcuts For” to Application Menus and toggle the disclosure triangle for the Layer menu. Scroll down to layer Mask and add your own shortcuts by clicking in the blank area to the right of the command. Click Accept and then OK. Assigning shortcuts is a quick way to add a layer mask while ignoring/respecting the current selection.