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iPhone THE MISSING MANUAL - Cdn.oreilly.com

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Brightness slider. Drag the handle on this slider, or just tap on the slider,<br />

to control the screen brightness manually, keeping in mind that more<br />

brightness means shorter battery life.<br />

If Auto-Brightness is turned on, then the changes you make here are<br />

relative to the <strong>iPhone</strong>’s self-chosen brightness. In other words, if you<br />

goose the brightness by 20 percent, the screen will always be 20 percent<br />

brighter than the <strong>iPhone</strong> would have chosen for itself.<br />

Auto-Brightness On/Off. Tap anywhere on this switch to disable the<br />

ambient-light sensor <strong>com</strong>pletely. Now the brightness of the screen is<br />

under <strong>com</strong>plete manual control.<br />

Wallpaper<br />

Wallpaper just means the photo that appears on the Unlock screen, when<br />

you wake the <strong>iPhone</strong> up. You’re not stuck with the Earth-from-Space photo<br />

forever (although it is a very nice piece of wallpaper).<br />

To choose a different photo, tap the Wallpaper row. On the Wallpaper screen,<br />

you’ll see at least three sub-items:<br />

Settings 247

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