With Revit 2017 you can document projects more consistently and accurately with annotations that allow calculated values and obey pin restrictions. Create a tag with a calculation in it and use it with any tag type. When you reposition an element, a pinned tag remains in place while its leader adjusts to accommodate the new position of the element. See what else is new in Revit 2017 http://autode.sk/1p7Lgzj | Autodesk Revit