Anyone know how to quickly go from Bright to Dim?

Just installed it this weekend on 2007 Deluxe. Love it! Nice to have a tach. Also the gear position works, which is not supposed to on the 2007 models. But, the fuel range mileage doesn't.

Anyhow I would love to know how to work the bright dim feature other than going through the setup menus.

Thanks for the help.