on the back of the helmet. this keeps it in place to test fit but is much easier to remove if you want to try various settings. in each setting, once you have the one set of tabs in place. put the helmet on your head. hold the chin strap tight or clip it and snug it around your chin. now push up on the underside of the visor. the helmet should stay covering your forehead, and still allow you good vision out the front. once you have found the correct hole setting that does this bend the second set of tabs to fit in the holes and this will 