Question: It isn't obvious how county (or state) boundaries can be shown in the "show-in" graphic display.  What do I need to do to import and/or display them?

Answer: You will need to take two steps to make the county boundaries appear on the screen.

The first step is to enable boundaries to be displayed on the screen by clicking the "Show Terrain Limits" button. This button is located on the toolbar on the left side of the screen. You can also click the "Label Terrain Limits" button below the "Show Terrain Limits" button to display county names.

The second step is to go to the display options screen by clicking the Options button. Once the "Show Options" window appears, click the "Terrain Limits" tab. Click the checkboxes next to the last two options and click OK. You may have to zoom out several times to see the boundaries.