When I use the gradient tool, it affects the layer, and if I am unhappy with its results, I just UNDO and then try again. It is basically a "one shot deal" ... love it or hate it. However, in this YouTube tutorial (5:25 to 6 min.), the gradient tool in the mask seems to be ADDITIVE, like he keeps adding to what is being masked. https://youtu.be/oZr378NyOKM?list=PLHRSsMUaMQK3CeE_8Ayg36ix01Zgh9teI&t=325 When I try this, after one gradient tool stroke, it completely annihilates any prior masking and creates something from scratch. And the same for each successive gradient tool stroke. So how is he able to make it ADDITIVE? Please help! Thank you!!
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