Changing the Screen Brightness
The iPhone's screen is useless if you can't see it, so you can adjust its brightness to make it brighter or dimmer. (Just remember that the brighter the screen, the more power it consumes, reducing the battery life of your iPhone.)
You have two options for modifying the screen brightness. You can modify the brightness manually, or you can rely on the Auto-Brightness feature, which tries to adjust the screen's brightness in changing lighting conditions.
To adjust the screen brightness of your iPhone, follow these steps:
From the Home screen, tap Settings. The Settings screen appears.
Tap Brightness. The Brightness screen appears, as shown in Figure 7-4.
Figure 7-4. The Brightness screen lets you manually adjust the screen ...
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