How to change the screen brightness on my BlackBerry Bold 9900 4G

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Set the backlight brightness to a lower level to help save battery power.
1. Scroll to and select All.
2. Scroll to and select Options.
3. Scroll to and select Display.
4. Scroll to and select Screen Display.
5. Scroll to and select Backlight Brightness.
6. Scroll to and select the required setting (e.g. 60).
7. Press the Menu key.
8. Scroll to and select Save.