Overlay an Inverted Layer Onto a Photo to Brighten Underexposed Areas

Adam Dachis over at Lifehacker offers a simple method for correcting underexposed photo with any image editor that supports layers, inversion, and Overlay blending mode. Simply create a duplicate later, invert it, set the blending mode to Overlay, and then adjust the opacity to suit your taste. While it’s certainly not a pro photography trick — other techniques including adjusting the curves and levels may be better — it’s a quick and easy tip that may be good to know.

Fix Your Photo’s Exposure Problems in Seconds With This Simple Trick [Lifehacker]