Hello, is there a basic masking tutorial anywhere? I used to be GREAT at it but it's now been 10 years. I was taught by a colleague at University when I was masking small images from currencies to use in a print. I remember I needed to do something with layers first (or be sorry later) & needed to be using the brush on black. It would paint "white" rather than red, but that may have been a choice. Appreciate any link to simple method. Gracias!