How to change the screen brightness on my Sony Xperia SP

Click each step to see the action. You can also click the picture or use the arrow keys.

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Reducing the screen brightness will help conserve battery power.
1. Touch Applications.
2. Touch Settings.
3. Touch Display.
4. Touch Brightness.
5. Touch Adapt to lighting conditions.
6. Adjust the slider to change the screen brightness.
7. Touch OK.
8. The screen brightness has been changed.