How to Use the digital zoom feature on an iOS 4 mobile device

See how to work with the new digital zoom feature built into iOS 4. Apple's new iOS 4 for the iPhone and iPod Touch brings with it a host of new features. While that's certainly a cause for celebration, there's also, believe it or not, a downside: learning how to take advantage of them. Happily, the web is awash in helpful video tutorials like this one which make the process a pleasure (and a simple one at that).