Making quick overall adjustments to an image

The Brightness/Contrast, Auto Levels, Auto Contrast, Variations, and Auto Color (Photoshop) commands change colors or tonal values in an image but are not as precise or flexible as the high-end color adjustment tools. They provide a quick and simple way to make overall adjustments.

Related Subtopics:

Using the Brightness/Contrast command
Using the Auto Levels command
Using the Auto Contrast command
Using the Auto Color command (Photoshop)
Using the Variations command