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Tham khảo tài liệu 'hướng dẫn sử dụng blackberry 8700 phần 5', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 23 Screen display Turn off automatic backlighting adjustment Set how long backlighting remains on Turn on and off the device screen Adjust the brightness of the backlighting Set the display language Set the Home screen background image Download background images Set the font Assign a program to a Convenience key About themes Apply a theme to your device Delete themes Download themes Organize the Home screen Organize the programs list About backlighting The screen and keyboard on your BlackBerry device are designed to be lit so that you can use your device in various lighting levels. The device is also designed to adjust the backlighting level automatically as the lighting level in your environment changes. Turn off automatic backlighting adjustment To stop your BlackBerry device from adjusting the backlighting level automatically in the device options click Screen Keyboard. Set the Automatic Backlight field to No. Click the trackwheel. Click Save. Related topic About backlighting See page 81. Set how long backlighting remains on To set how long backlighting stays on if you do not use your BlackBerry device in the device options click Screen Keyboard. Set the Backlight Timeout field. Click the trackwheel. Click Save. Related topics About backlighting See page 81. Adjust the brightness of the backlighting See page 82. Turn on and off the device screen To turn on the screen roll the trackwheel or press a key. When your BlackBerry device is not used for a period of time the screen turns off to conserve battery power. Related topics About backlighting See page 81. Adjust the brightness of the backlighting See page 82. User Guide Adjust the brightness of the backlighting In the device options click Screen Keyboard. Set the Backlight Brightness field. Click the trackwheel. Click Save. To increase the brightness of the backlighting temporarily press the Power button. Related topic About backlighting See page 81. Set the Home screen background image In the pictures list .
