The command scales the brightness
values of the active layer so that the darkest point becomes black
and the brightest point becomes as bright as possible, without altering
its hue. This is often a “magic fix” for images that are
dim or washed out. “Normalize” works on layers from RGB,
Grayscale, and Indexed images.
8.10.1.
Activate the Command
8.10.2.
“Normalize”Example