To expand the incoming relationships for an object in a diagram generated in copy-and-paste mode, select the object on the diagram canvas and choose Expand > Expand Incoming in the right-click menu. To expand the outgoing relationships, select the object on the diagram canvas and choose Expand > Expand Outgoing in the right-click menu.
To collapse the incoming relationships for an object, select the object on the diagram canvas and choose Collapse > Collapse Incoming in the right-click menu. To expand the outgoing relationships, click the object on the diagram canvas and choose Collapse > Collapse Outgoing in the right-click menu.