Changing the Brush Profile
 
 
 

The brush profile describes the size and edge softness of the custom brush. The default S-curve defines a circular airbrush. You can change the curve by manipulating the two points that define the curve, or you can add points to the curve.

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(a) Profile box  (b) Brush profile  

The profile does not affect the brush in the editing panel until you modify the curve or click the Update button.