Sparx Systems ran a webinar last week to demonstrate Enterprise Architect traceability features i.e. to find how our model elements and diagrams are interconnected with each other. This is paramount in modelling where we don't only intend to define a visual representation of a more or less complex concept, but we also need to build a centralised project information repository.
The "usual features" like the Relationships Matrix or the Traceability view were included in the webimnar, as well as examples of the types of links between elements such as realisation links from use cases to requirements.
I discovered the Context Filtering feature that's available on the currently displayed diagram : to enable it, simply right click on a blank part of the diagram, and enable "Context Filtering", or click on the icon on the diagram toolbar.
From then, EA greys out all elements that are not directly associated with the currently selected element, highlighting all elements and associations linked with the selected element. This is illustrated as follows :
The above example illustrates how it works, and the benefits would be easily seen from a diagram with numerous elements, e.g. with 20 components plus twice as many interface.