Grooms hair in a specific direction, following the emitter's geometry wherever possible.
To apply: Select at least one point on each of the guide curves you want to comb, and then choose one of the items on the Modify 
Comb menu on the Hair panel (except Along Normals, which actually applies a Hair Puff Operator). If you select the entire hair
object instead of points before combing, all guide curves are combed.
To display: Select the hair object, click the Selection button on the Select panel, and then click the Hair Comb Operator icon.
For more information, see Combing and Recombing Hair [ Hair ].
