AutoCAD Inventor :: Showing A Ground Plane In Drawings?

I'm doing drawings of a construction site.  Traditionally, in AutoCAD drawings, we show a solid line to represent the ground plane in elevation views.  I'd like to do the same thing in my Inventor drawings.

I can "include" the XZ Plane in the view, which shows the line I'm wanting, but it shows as a phantom line.

Right-clicking either the line in the drawing or the plane in the browser only gives me the option to "Edit Center Mark Style..."

If I go to the Style Editor, Object Defaults, Work Plane, the object style is Center Mark (ANSI).  If I click on that, the drop-down only gives me that one choice.

Infrastructure DSP '14 / Product DSP '14 / Vault Professional 2014
Dell Precision T1650
Windows 7 Professional SP1 64-bit
Intel E3-1270 V2 3.5GHz / 32G RAM
Nvidia Quadro 2000, Driver 331.82
Space Navigator, Driver Version 6.17.7