Contour level display over aerial imagery

Help! I am taking over for a PM who just left our organization and am working on the drainage design for a project. I have an existing terrain model and just received aerial imagery. I have been able to reference the aerial imagery and align it with the terrain model, but I cannot change the display to show contours from the terrain model over the aerial imagery. Line work appears over the imagery, but the terrain model won't display. I'm relatively new to OpenRoads, so I don't know if there is a process to change the terrain display to line work so it displays over the imagery.

Thank you!

Kevin Sonico, EIT Idaho Transportation Department