First of all it's necessary to mention that grids aren't visible on a 3D view in Autodesk Revit. Of corse, our main workflow is based on 2D views (plans, sections and elevations), but sometimes it can be very useful for better understanding of building dimensions or positions of its main constructions.
If you want your grid lines are visible on a 3D, there are some ways to solve this issue. I'm sure experienced users successfully work with them, but I hope these advice could be useful for beginners.
