When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I think you just hit the bottom button on the gauge controls don't you? I'm not sure but that's how you control the functions on all the other items on that gauge so it stands to reason that's how it would work....but I imagine you've already tried that if you're posting this.