Using the color adjustment tools

All Photoshop and ImageReady color adjustment tools work essentially the same way: by mapping an existing range of pixel values to a new range of values. The difference between the tools is the amount of control they provide. For an overview summary of the color adjustment tools, see Basic steps for correcting images.

Related Subtopics:

Making color adjustments
Viewing the color values of pixels (Photoshop)
Saving and reapplying settings