I'm currently recolouring some photos so I made a selection of a dress, then went to the Layer menu and selected "recolouring adjustment" from the "new adjustment layer" submenu. I did my edits but discovered that I left out a part of the dress.
In photoshop I would have edited the alpha or mask layer but here that seems to be uneditable? I see an alpha with a black and white image showing me my selection but I cant edit it.
The workaround I found was to create a greyscale layer from my alpha channel, then do the same with the other one and combine these two followed by creating a new recolouring adjustment. While this works I refuse to believe that this is the right way to do it. Everything else is so simple, I must be doing this wrong.