Add target objects for aim constraints

User Guide > Rigging > Character Setup > Constraints > Edit constraints > Edit aim constraints >

After you’ve created an aim constraint, you can add more target objects for additional control over the constrained object’s orientation. Adding more target objects is similar to creating aim constraints.

To add target objects

Select one or more objects you want to add as target objects, followed by the constrained object.
Select Constrain > Aim > .

The Aim Constraint Options window appears.

Click Add to add the selected objects as target objects.