How to Apply One-Step Auto Fixes in Photoshop Elements 11
The Auto Contrast command is designed to adjust the overall contrast in an image without adjusting its color. This command may not do as good a job of improving contrast as the Auto Levels command, but it does a better job of retaining the color balance of an image. Auto Contrast usually doesn’t cause the strange colorcasts that can occur when you’re using Auto Levels.
This command works really well on images with a haze.