What It Does:
Connects two objects together. The object that has the Join behavior is considered the parent object, and the object that is connected by the behavior is considered the child object. The child object becomes an extension of the parent object. Every attribute of the child object is set with the parent as a point of reference. Joined Objects cannot be copied.
How to Use It:
Join To - Selects the object it joins to. The object chosen is considered the child object.