I find it very difficult to edit arcs in Revit. I wish the program would allow you to easily move an endpoint of an arc similar to the way Autocad allows you to manipulate arcs.
@leilani.gnall-gregory: Absolutely. It seems that BIM elements and CAD elements don't get along very well in Revit. I wish Revit would me more CAD-friendly. I mean like Graitec Advance Design is. It has CAD elements that get along with BIM structural elements quite well. Snapping grips seems to be part of the problem. The logic of binding/locking CAD and BIM elements together should include specific points, not just lines and planes.
P.S. Revit should be more scientific and less artistic.
Arcs - Yes! and easier manipulation of splines -- in Archicad it's a piece of cake to edit all curved linetypes and switch between straight or curved or splined segments -- why can't Revit have this functionailty!?!