The Revit Scope Box allows for consistant extents of gridlines and datums thru out multiple levels in a project. Scope boxes control the visibility of datum elements in views whose cutting plane intersects the scope box. Scope boxes are particularly useful to control the visibility of datums that are not parallel or orthogonal to a view.
Scope boxes are automatically visible in 3D views and any view whose cut plane intersects the scope. They can also be set to display in elevation views. You can set their visibility for other views by resizing them or changing their visibility property. Scope boxes do not print in construction documents.