In doing the "Complete This Challenge" I found out something about mask.....I never knew!
Ok,.......make a new canvas.....fill it with whatever.....just to start, make it a gradient......then go to Layers.....toward the bottom you will see Load/Save Mask......click......Load Mask from Disk....click...look thru your mask/choose one.....click Load.....then look at your gradient.......You can make a mask out of anything....and have it "match" your project!
I knew I was behind in knowledge but I didnt know I was this far behind......
Loves C








