The Double-Ringed Cursor
*Adobe Bridge CS4 and Adobe Camera Raw 5 Tip*
When you use the Adjustment Brush in Camera Raw, you'll notice that there are two brush cursors displayed at the same time, one inside the other. The smaller one shows the size of the brush you've selected; the larger (dotted-line circle) shows the size of the feathering. Increase the Feather value to widen the distance between the rings; decrease the value to 0 and you'll see that there's no space.