Small problem. There must be a work around.
On my main floor plan I created a filed region to hide some parking stalls in one corner. That way I can put the mezzanine plan on the same sheet with the two viewports overlapping. But the filled region on the main floor view also affects the mezzanine view where they overlap on the sheet layout.
In AutoCAD, I would just create a non-rectangular viewport but I can't do this in Revit. Or can I?