Mastering color: using Hue/Saturation
Elements has several color adjusting tools—the most commonly used perhaps being Hue/Saturation (Ctrl/Cmd + U).
Hue describes the color values of the pixel. Use this slider to reassign different color values from what's in the file (that is, changing red to yellow). Used solo, it works globally, so not only do the red tones change to yellow, but all the other colors shift their hues as well, often producing wildly surreal and not very useful color results.
Saturation controls the intensity of the color value in the pixels. So, if you set the slider to a minus amount, it loses color, or desaturates, eventually turning black and white. Shifting it to the right increases the color values, making the picture richer in color. As it's a global change, everything in the file gets more or less colorful.
For me, Lightness isn't very useful. The slider adjusts the maximum and minimum black levels in the...