If you bought Trackball Marble from Logitech, the first challenge you encounter is probably related to the lack of the wheel button. Unfortunately the software provided with the device for Windows doesn't help (neither Universal or Auto Search aren't really working as I was expecting). Internet suggests mostly one option, app called Marble Mouse Scroll Wheel http://marble-mouse-scroll-wheel.software.informer.com/ To some extent it works, but I wasn't able to make it work in google maps or in picture viewer. Moreover setting where crashing very often (I am running windows 7 64 bits). Fortunately there is a way to have a semi-wheel button behavior with this trackball, but with a different software - X-Mouse Button Control: http://www.highrez.co.uk/downloads/XMouseButtonControl.htm Setup Mouse button 4 and 5 as wheel up and wheel down. Then also update Logitech SetPoint settings to replace the behavior of those button to default. Voila - now you can emulate wheel