When you want to replace one object with another object, Author assigns all of the relationships from the first object to the replacement object. For example, Object A is an image that is used in a topic. Using the Replace action, Object B is selected to replace Object A. After the Replace action has been completed, Object B appears in the topic instead of Object A, and Object B is assigned to any other relationships that had been assigned to Object A.
Before replacing objects, be sure none of the objects using or used by this object are currently in use.