| 摘要 |
A portable electronic device comprises a user input device capable of adopting at least three pre-determined positions, each of which enables an associated function to be actuated, a device for presenting information to a user, and a processor for receiving inputs from the user input device and altering the operating state of the portable electronic device accordingly. The portable electronic device is operable to scroll through information items presented to a user, the user input device being arranged to present at least two scrolling speeds. A first scrolling speed is selected when the user input device is placed in a first pre-determined position and a second scrolling speed is selected when the user input device is placed in the first pre-determined position and pushed into the portable electronic device. Preferably the user input device is a joystick, 28.
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