If you are talking about the bed camera (in light above rear window), mine has a single center line. the line also shifts when you turn the truck. I marked a centerline on part of my camper (with a piece of black electric tape) and that helps keep camper centered while backing truck under camper.
2018 F350 6.7 diesel, 4x4, DRW, crew cab, 8' box.
2018 Northern Lite 10-2 EX CD SE.
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