The 'ORM Context Window' was designed to do this, although this is basically a proof-of-concept solution with lousy layout and some major performance issues. I'd recommend leaving it at generation 1 or 2. Don't try 3 on a large model unless you save first.
The Verbalization Browser lists all fact types that use the selected object type as a role player.
The diagram spy will show items if you choose 'Select in Diagram Spy' with an item selected in the document window, or click a hyperlinked item in the Verbalization Browser. This is discussed in the 'General Use' section of the readme (items 5 and 6). This section also has some other pointers, such as how to get object type shapes for a fact type without displayed role players. However, the diagram spy just shows shapes as they appear on existing diagrams. It will not show all related shapes.