Adjust surface point normals by painting.
This tool is useful for defining the direction of attributes such as fur.
Click the Comb tool on the Character tab.
Set the Comb Lift, Radius, UV Radius, and Opacity on the operation controls toolbar.
Hold and drag your cursor over the vector attributes you want to comb.
You can comb other vector attributes by turning off the Override Normal checkbox and typing the name of the attribute you want to comb.