The 'Links' tab of the element 'Properties' dialog provides a list of all relationships that the current element is a partner in.
Access On a diagram or in the Project Browser, right-click on element and select:
Properties > Links or
Properties Page | Links
The Relationships panel lists the relationships this element has, showing the:
From the 'Links' tab you can perform operations on a relationship, by right-clicking on the relationship to display the context menu.