I'm doing a grading plan and typically there is an existing contour (elevations) then proposed (elevations). I was wondering if Home Designer Pro 2015 can perform this. I did find in the Tools>Display Options (Layer Display Options) [Terrain, Primary Contours] & [Terrain, Secondary Contours]. In the dialog box under Disp is checked but the plus sign is not present. I went through all the menus and was not able to locate this feature. The Primary Contours I know how to build, how do I build a Secondary Contour.