I was wondering if there is a way to lock color just the opposite of locking the alpha channel, often I found myself trying to color "under", and realizing that selections are not smooth I have to add a layer, sometimes is just a couple of strokes therefore I get kind of lazy doing this , and I haven't found if there is a workaround that doesn't include what I just mention (selection and adding layers). the locking of the alpha channel is quite useful in either the brush or the layer, I really wish I could do just the opposite and paint only on transparency without touching the color that is already there. But who knows, may be is just me .

Try the 'behind' blending mode!

TheraHedwig wrote:Try the 'behind' blending mode!

I'm getting old! Didn't realize there were more blending modes down the menu! And with a shortcut, nice! Thank you TheraHedgwig, I need to "play" more with the interface from now on.