(with the Canon A610) Set the top dial on your camera to My Colors Mode and then Press the Func Set Key and scroll down to select the icon with the tube of Paint and A on it. Scroll right till it says Color Accent Menu. Hit the Menu key and place the center box on the lcd over the color you want to accent and then hit the left cursor (back). The color you have selected will blink in color and then with no color. That will set that color to remain and the rest of the image to b/w.