How do I keep a single color in an otherwise B&W photo using PSE 11 ?
Open the picture with color
Get the smart brush tool (the one with the gears) out of the toolbox. In the drop-down, go to Reverse Effects, and in the dialog the first one should be "Turn image black & white in reverse".
With cursor, drag over the object that is to remain in color
Thank you, it worked! Slightly different in PSE11 but I figured it out.