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In this Photoshop tutorial, Richard Harrington gives some tips on how to fix an underexposed or overexposed image using the shadow / highlights command in Adobe Photoshop CS4 and goes through each of the advanced settings to give great understand of how you can harness the power of this adjustment tool. The shadow / highlights filter can also be used on Smart Objects in recent versions of PS, expanding the way you can dynamically utilize this tool.
