custom brushes
The Adjustment Brush comes with a list of handy presets accessible via the Effect dropdown. Choose from options like Iris Enhance, Skin Softening and Dodge and Burn, or alternatively, create your own custom brushes. You could, for example, make a desaturation brush for your spot colour effects: just select the Adjustment Brush and set Saturation -100%, then click the Effect dropdown, choose ‘Save Current Settings as New Preset’ and give it a name.