Specifies where grid lines or arcs appear in the model. You can place grid lines or arcs only where grid planes/cylinders intersect elevation planes. Therefore, you must place at least one elevation plane and one grid plane/cylinder before you can successfully use this dialog box.
Display grid lines on
Specifies how to choose the elevation planes that the grid planes/cylinders intersect. The selected elevation planes display a grid line or arc.
Available Elevation Planes
Displays all elevation planes that intersect the active grid plane/cylinder. Elevation planes in this list do not have a grid line/arc.
Selected Elevation Planes
Displays all elevation planes that you have selected to have a grid line/arc.
Add
Moves the selected plane from the Available Elevation Planes list to the Selected Elevation Planes list.
Remove
Deletes the selected plane from the Selected Elevation Planes list. When a plane is removed, it appears in the Available Elevation Planes list.