Using the Auto Levels command

To enhance the contrast of an image that has an average distribution of color values, use the Auto Levels command. Auto Levels defines the lightest and darkest pixels in an image, and then redistributes intermediate pixel values proportionately.

Note: Because Auto Levels adjusts each color channel (red, green, and blue) individually, it may remove or introduce color casts. If Auto Levels introduces an undesirable color cast, undo the command, and then try the Auto Contrast command instead. See Using the Auto Contrast command.

To use the Auto Levels command:

1. Do one of the following:
• To make adjustments to your entire image, choose Select > Deselect to make sure nothing is selected. If your image has multiple layers, select a layer to adjust in the Layers palette.
• To make adjustments to a portion of your image, make a selection in the document window. See Selecting pixels.
2. Do one of the following:
• Choose Enhance > Auto Levels.
• Choose Enhance > Adjust Brightness/Contrast > Levels. In the Levels dialog box, click Auto, and then click OK.