Add object constraint to a number of selected objects I have a large number of objects, and I wish to add a Track to constraint to each object.  When I select the group of them and then add the constraint, it is added to only the active object, of course.  How can I add the constraint to all selected objects?
With the objects selected, add the desired constraint to the active object.
From the 3D View header menu choose Object > Constraints > Copy Constraints to Selected Objects.


All the objects will now have the same constraint.

This method doesn't require an add-on to work.