I have spent a considerable amount of time understanding and teaching the Revit Coordinate system. Right now, we have the ability to turn on/off the Project Base Point and Survey Point markers, but the Internal Origin point does not have a marker. While unclipping and telling the Project Base Point to move to the Startup location works (if it was moved to start with), it would be nice to have an option to show this with a marker (I'm thinking a solid filled dot would be nice).
Also, while we are at it, when a file (Revit, CAD, Sketchup, others) are linked in, it would be nice if there were an option to show the Internal Origin, Survey, and Project Base Point of the links.
I think these options would help a lot of people understand the Revit Coordinate System a little better.
Sash Kazeminejad