Elements 10: In the Extraction Tool preview window, enable Hide/Show of foreground/background marks
Photoshop Elements 10—Extraction tool. We're invited to refine our selection, but the foreground/background marks make it difficult to see what actually was selected; and they can't be removed. Design the show/hide key combo Ctrl-H / Mac: Cmd-H (which currently works for selection boundaries) to hide and show the boundary markers in the Extraction preview window. It's intuitive and should be ridiculously easy to install.