Remington, on the 100 Meter Fortec Star Dish that I have the Elevation Scale Line Mark is on the Bracket just below the Degrees markings. Its likely the same for the 120 cm Dish. The mark is in WHITE and very hard to see. I have marked the one on my Dish with a black Felt Pen. If you look at the Assembly Drawings for the Fortec Dish the "Scale Line" is labelled there. I have a word document pic of it from the Fortec Site that I'll try to attach. Hope this helps.