Once
            you have a characterized skeleton, you can create a Control Rig
            for your character. Characters must have a Control Rig in order
            to receive retargeted animation. 
         
         To create a Control Rig
         
         
            - In the HumanIK window,
               switch to the Characterize tab or the Skeleton Generator tab.
            
 
            - Select an HIK character from the Character drop-down
               list. (The character must have a characterized skeleton.)
            
 
            - Click Create Rig.
               
The Control Rig effectors
                  are created based on the structure of the character’s skeleton (defined
                  in the Mapping List of the Characterize tab). 
               
               TipYou can change the
                     display of the Control Rig effectors by selecting Control
                        Rig > Look and Feel in the HumanIK menu
                     bar.