What is an Adjustment Layer?
Just as it sounds, an Adjustment Layer will alter an aspect of your photo on a separate layer. What this type of layer unique is that the adjustment made via an Adjustment Layer can be changed or masked at any time and removed with no ill affect to the original image. Ever adjust a the brightness or color of an image early on, then after 30 or more alterations, want to go back and undo or tweak that initial change? If you used an Adjustment Layer, you can double-click it and change the setting. Without an Adjustment Layer, you’d have to undo everything you’ve done up to that point. Adjustment Layers offer more flexibility. Adjustment layers also come paired with Masks. A mask is an instruction in the layer that tells the layer what parts will show through and what parts will not (masked parts). So you can make and adjustment layer that increases the orange saturation in an image, then mask (hide) its effect for the portions of the image you don’t want to have increased orange saturatio
