Architecting and designing : Data modeling : Components of an entity relation diagram : Objects in an ERD : Entities : Add immediately related entities
  
Add immediately related entities
In an Entity Relation diagram you can add related entities to a particular symbol by selecting it and choosing Edit, Add Immediately Related Entities. You may also right-click the symbol and choose Add Immediately Related Entities.
The entities will automatically be drawn on the diagram along with their appropriate line symbols.
See also
Entities