Abstract: The present invention relates to a system being adapted to be connected to at least one computer. The system comprises: at least one tracking surface, and a pointing device adapted to navigate on the at least one computer when the pointing device is moved across the at least one tracking surface, which defines a first zone and a second zone. The system further comprises a detection unit which detects the zone the pointing device is present in, and a control unit adapted to activate a function when present in the first zone.