To set aim constraint options
         
         
            - Select the objects you want to constrain. The last object selected will be the constrained object.
-  Select Constrain > Aim >  . .
-  Set the constraint options. You can also do the following: 
                  - Select  to save the constraint options.
                  
- Select  to reset to the default constraint options.
                  
 
- Do one of the following: 
                  - Click  or  to create an aim constraint.
                  
- Click  to close the  window.