Screen and input
The Pre features a 3.1-inch capacitive touchscreen over a 24-bit color 320×480 resolution HVGA liquid-crystal display. The touchscreen allows for manipulation of the UI with fingers instead of a stylus, commonly used with older Palm phones and PDAs. Below the display is the "Gesture Area", a touch-sensitive area with LED underlighting that permits additional touch commands.
On the Pre, the keyboard slides out, and is curved to follow the contour of the human face. In addition to the keyboard, the device features a single button in the center of the Gesture Area, a volume rocker switch on the side, and a ringer switch on the top.
The Pre features three input sensors that allow it to respond to its surroundings. An accelerometer automatically changes the orientation of the display between landscape and portrait when the device is rotated in the user's hands. An ambient light sensor allows the Pre to automatically adjust the brightness of its display. A proximity sensor allows the Pre to disregard touch inputs when the phone is held close to a user's face during a call.
The Pre also has an integrated 3.2 megapixel digital camera with LED flash.
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