I tried to use to the overview component with a usual GoXam diagram, and it display correctly any GoXam element, but do not display other element, such as a WinForms control in node.
I suppose it’s perfectly normal but I would like to have a confirmation it’s not related to my prototype.
The Overview control will show the Nodes and Links that are in the Observed Diagram’s Model.
If your Node DataTemplate includes a WinForms control, I don’t see why it wouldn’t show there too. Unless there’s something preventing it from being instantiated a second time on the same data.