I remember when I was first learning digital photo editing and I stumbled across something called “levels”. Some of my photos had looked grey and dull, though I did not realize it at the time, and these suddenly sprang to life as I learned how to use the levels adjustments in Photoshop.

There are several different types of adjustment layers, such as levels or hue & saturation. In this tutorial I demonstrate the use of an adjustment layer, using a hue & saturation adjustment layer as an example.