In the diagram below I've created a usage context for port-based classes PortSystem_, PortClient, and Administrator and I've already used RelatedElements > Display Ports to show the ports on each Property typed by the port-based classes.

One can show what interfaces are provided and/or required by a Port of a Property from the context menu items for a Port as shown. This results in the "lollipop and fork" notation with a comma-separated list of the required or provided interfaces, as shown next .. 

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