I'm trying to select the area I masked so that I can actually delete it from an image. I know I've done this before, but I can't remember how.
You may be thinking this defeats the purpose of masking in the first place. Well, yes. However, I want to apply a gradient mask to the area I left visible, and if I try to do this in the current state it alters the current mask (bringing back parts of the image I don't want). I don't mind losing the original mask content at this point as I'm ready to move on to this next step.
Alternatively, if there's just a better way to reach my actual goal please let me know.