NoteThe hair follicles you want to assign your hair constraint to must be part of the same hair system. You cannot assign hair
               constraints to multiple hair systems.
               
However, you can make multiple hair constraints that are assigned to multiple hair systems act like a single constraint by
                  parenting your constraints to a single constraint, and then hiding the child constraints.
               
             
         To assign hair constraints
         
         
            - Select the hair constraint you want to assign and then Shift-select the follicles to which you want to assign the constraint.
- Select Hair > Assign Hair Constraint >  . .The  window appears. See Hair > Assign Hair Constraint.
                
- Set the  as you desire.
            
- Do one of the following:
                  - Click  to assign the selected hair constraint to the selected hair follicles. The  window closes.
                  
- Click  to assign the selected hair constraint to the selected hair follicles. The  windows remains open.
                  
- Click  to cancel the operation and close the window.
                  
 If you clicked or , the selected follicles are added to the selected hair constraint or the hair constraint is reassigned to the selected hair
                  follicles.