The size of a datum plane (a plane for a level - grid - or reference line). Datum planes are not visible in all views. If the datum does not intersect a view plane - it will not be visible in that view. You can resize datum planes so that they are vi

Revit is often used for designing buildings and creating 3D models of architectural designs. It allows architects to create detailed building designs, visualize the project in 3D, and produce detailed documentation and construction drawings.
Revit is a contraction of Revise-Instantly.