On my OTS, I set it up so the lever is to the left of the front handle when facing. When the lever is push to the back and hits the back leg, it is just closed. Any amount pulled to the front is opening. For slow cooks where I might need to adjust it, I just bend over and look from the bottom. When I am done cooking and want to extingish, just a pust to the back to hit the leg and I know it is closed.