Double tapping the Home button in iOS4 reveals the task switcher. This pops up from the bottom of the display and dims the other icons.
 

Double tapping the Home button in iOS4 reveals the task switcher. This pops up from the bottom of the display and dims the other icons.

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Sneak peek: Running iOS 4.2 on your iPad

We take a look at what changes iOS 4.2 will bring about on the iPad.

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