When creating point constraints, you can first set creation options and then create a point constraint, or you can immediately create a constraint with the current creation options. Using the constraint creation options, you can also add the constraint to an animation layer.
To add a point constraint to an animation layer
Turn on Maintain Offset when adding constraints to animation layers so that your constrained objects do not move unexpectedly.
The constraint animation is now contained in its assigned animation layer, and it contributes to the result animation in your scene.