“First, open an image that needs some work. Now make a copy of your background layer by dragging its layer thumbnail from the Layers palette to the New Layer icon at the bottom of the Layers palette. Since Shadow/Highlight doesn’t work as an adjustment layer, having a copy will let you put some of the original back later if you find you prefer it. All your adjustments will be done to the copied layer. You can ignore the original background layer for now.”
“Photoshop Shadows/Highlights settings windowNow go to Image >> Adjustments >> Shadow/Highlight. The basic dialog has only two sliders, one for Shadows and one for Highlights. If that seems too simple, it is. Click on “Show More Options” to access to the real power of Shadow/Highlight. This will give you three sliders each for Shadows and Highlights plus several bonus sliders and controls in a section labeled “Adjustments.” More sliders means more control.”
