Topic: Selection boundaries
I would find it very useful to have a Fade Mode that is a reverse version of Selection boundaries. Instead of fading the boundaries, it could fade the Center of the image. With that feature, I could apply a strong effect like a blur and then fade the center back to the original. It would help in framing an image with a filter effect while keeping the center intact.
Just a suggestion. I thought it might not be too difficult to program since it is the reverse of an already existing feature.