Offsetting Objects Moving Along Path
When an object is moving along a path, you can use the offset feature to shift the entire path and to set rotate or scale keys in addition to using the dummy method.
There are three types of offsetting: Move, Rotate and Scale. The Move
offset can shift the entire path to create a derivative route, while the Rotate and Scale settings are keyable in order
to rotate and scale an object while it is moving along the path.
Refer to the following sections for more information: