Cannot Snap to Wall Endpoints or Corners in AutoCAD Architecture - Resolved

Problem:  Designer cannot snap to endpoints or intersections or corners of walls that are AutoCAD Architecture Objects.

Solution:  Thaw layer zero in your drawings.  AutoCAD Architecture objects require layer zero access for some functionality. 

Revit Grid Lines don't display in Elevation - Another Fix

Revit Elevation Marks automatically try to align themselves perpendicular to nearby objects, but if they are not perpendicular to the grid, then the grid lines and bubbles won't display in the resulting elevation view.  If you have tried all the Tips for Missing Grid Lines at the Revit Clinic and David Fano's video and work around is not your cup of tea, then try this simple trick.

Problem:  Elliptical Atrium in center of floor plan and all elevation marks placed within the atrium do not display grid lines in elevation views.

Solution:  Add an elevation mark by clicking close to an orthogonal wall outside the atrium area, then move your mark inside the ellipse where you want it to display in the plan view. Adjust your clip offset and extents. Verify that your grid lines are now displaying correctly in the Elevation View.