*Adobe Bridge CS4 and Adobe Camera Raw 5 Tip*
To rapidly change the Size, Feather, Flow, and Density of a brush, use the A and B preset brushes. To set them up, click one of the brushes ( A or B ) and change its settings. Make one brush large with Auto Mask off for painting areas such as backgrounds. Click the other brush and make it small with Auto Mask checked on for finer detail and edge work. Press the Forward Slash key ( / ) to quickly switch between the brushes.