How Can I Determine if a Relationship is a Master View or an Auxiliary View

In an ER diagram where model elements have been reused, I can tell whether an Entity is the Master or Auxiliary by the “M” or “a” character which appears in the top left-hand corner of the Entity’s displayed image on the diagram.

My question is: how can I determine whether a Relationship is the Master or Auxiliary?

First find the relation in the model tree by right clicking on the relation and navigating to “Select in Tree.”

Once the relation is found, you can right click on the relation, and choose “Show View.” If the master view is a diagram, it will be indicated by bold text and “(Master View)” in the preview.:

If the master view is set to Model Structure, the master view is shown on Model Explorer.