Show Floor Plan Through Roof Overhang in Revit

Question
How can I show the footprint of a plan in the site plan when it is hidden below a roof overhang?

Answer
Change the Model Graphics Style to ""Wireframe"" on the View Control Bar at the bottom of the screen. Select the Drafting tab, then ""Detail Lines.""

Change the linetype to ""Hidden Lines."" Using the line tool, trace around the exterior face of the exterior walls. Change back the Model Graphics Style to ""Hidden Lines"" on the View Control Bar at the bottom of the screen. The dashed drafting lines will show through the roof. Be careful though, because if the location of the walls change, the drafting lines will not follow the change.