To view the grid along with our surface, follow these steps.
Choose geologic_surface as the object to edit. You can do this by pressing the Top button on the bottom of Viewer and selecting geologic_surface. (Clicking on the surface itself with Alt+Left mouse button would give you the same result.) If you correctly select the geologic_surface object, the button in the lower left corner of the Viewer will be labeled "geologic_surface."
Go to Editors->Object->Advanced Settings&ldots; in the Viewer
At the top of the Viewer: Object Editor window, choose Rendering Modes.
Under Line Rendering, choose Regular.
You should get the image shown above. Be sure to return the Object editor to it original state for the next steps.