I am trying to learn how to round corners and have a border color added to my photos. All the videos and info I am finding online are not helping at all!! what do I need to do. I get the rounded rectangle tool, make my shape and some one says I need to use the "subtract from area" tool and when I click that the box stays black and wont invert. Does that make sense? I am feeling super retarded right now. Any help would be most appreciated!