One of the most promising capabilities offered by the development versions of iOS 4.3 was a new set of multitasking gestures on the iPad, designed to allow users to quickly switch between active apps, but the capability was disabled in the final version of iOS 4.3, as it was considered a bit too experimental. The feature is still present in the final iOS 4.3 build though, and even though Apple chose not to enable it for now, it only takes minutes to switch it on.
To enable the multitasking gestures, you will need a Mac, and Xcode, a piece of software published by Apple to help developers build apps for iOS. You can either use Xcode 3.2.6 (available for free on the iOS Dev Center, you just need to register), or download Xcode 4 from the Mac App Store, for $5.
Once Xcode is installed, fire it up, plug your iPad to your Mac, and a new window should pop up. Select your iPad on the left menu (under ‘Devices’), then click on the button labeled ‘Use for Development’. If you are asked to enter a developer username and password, enter the information you used when you registered on the iOS Dev Center, and if you do not have an iOS developer account, simply hit cancel, as you don’t need to be a registered developer to be able to enable multitasking gestures.
Unplug your iPad, go to the Settings app, and switch the ‘multitasking gestures’ tab to ‘ON’. Your iPad should now support multitasking gestures.