If you are showing the topography also in the model, naturally it covers up the foundations (which are probably drawn by your structural engineer) with the typical earth hatch. How do we then show the foundations?
Actually it is easier than you might think. When in elevation, temporarily change your view type to 'wireframe'. Then under the 'Annotate' tab select 'drafting line' then use the 'Pick Lines' tool and you will be able to select any of the edges of your foundations and foundation walls. Be sure to select the appropriate line type (which you can also change after the fact) and return the view to the proper type of shading (probably hidden) when done.
