The functions in the Convert to menu are used to change the number of colors or shades of an image.
· Black/White will convert your image to black and white.
· Grayscale will convert your image to shades of gray.
· Indexed 16-Color will open a dialog that lets you reduce the number of colors in the image to a maximum of 16 Distinct colors.
· Indexed 256-Color will open a dialog that lets you reduce the number of colors in the image to a maximum of 256 distinct colors.
· RGB Deep Color will convert your image to 24-bit deep color.