So if you’ve noticed these double arrows in Revit 2020 and wondered what they are or how to get rid of them, heres a little more info on them.

The internal origin is the starting point for the internal coordinate system, which provides the basis for positioning all elements in the model.

Note: The location of the internal origin never moves.

You can turn this on and off through your Visibility Graphics, Model Caategories, Site, Internal Origin

Additional info here on the AKN