Adjustment layers allow you to make non-destructive corrections and enhancements to your photo project (or individual layers).
The Adjustment and Layers panels provide a range of adjustments you can apply to your photo or design. Once applied, they can be identified as both an adjustment and a specific adjustment type by using unique symbols.
Once selected, an adjustment layer is added to the Layers panel.
There may be times that you only want to apply an adjustment layer to either a single layer or a group of layers. This is easily achieved by clipping.
Adjustment layers also have mask layer properties. Areas of an adjustment layer can be revealed or hidden in the same way as with a mask layer.
The adjustment is added directly above the selected layer.
Do one of the following: