Dan, when you show the CMYK color values with an image, what part of the
image are they referring to? To my fairly newbie eyes it doesn't always seem to be the area under the icon, or am I wrong about that?>>
It's not supposed to be the area below the icon. The icon just illustrates one of the key colors of the image, and how it changes as a result of the correction. The idea is to get readers accustomed to what certain CMYK values produce.