I finally got them to load.  On the top one I used the dodge tool to lighten up the piece of salmon.  On the bottom one I made a transparent layer and set it at 50% gray so it appers transparent, then I painted it with either white to lighten or black to darken.  Whatever color you want to paint with you set to foreground.  I couldn't get the desired effect because I don't have a real mouse so it is very difficult because I'm not good with the touch pad.