Just get a new iPhone, iPod touch or iPad and trying to figure out how to use everything the Home button offers? Because Apple only uses a few buttons, the Home button has to do a lot. Follow along after the break for all the single, double, and triple click tricks!
Here's a complete rundown of how the Home Button works under iOS 4.2 for iPad, including what's the same as before and what's new with the update.
Single click Home Button
If your iPad is sleeping and you click the Home Button it will wake up and ask you to slide to unlock.
If you're in an app like Safari, Mail, Angry Birds, etc. and you click the Home Button you'll return to the Home Screen with all your app icons.
If you're on your second or third Home Screen and click the Home Button you'll return to your main (first) Home Screen.
If you're on your main (first) Home Screen and click the Home Button you'll go to Spotlight Search.
If you're on Spotlight Search and click the Home Button you'll go back to your main (first) Home Screen.
Double click Home Button
If you're iPad is sleeping but still playing music or media (iPod app, iTunes app, etc.) and you double click the Home Button the iPod controls will pop up on the lock screen so you can play, pause, skip, etc.
If you're on the Home Screen or using an app and you double click the Home Button the multitasking Fast App Switcher Dock will be revealed so you can quickly switch between apps or swipe over to the audio, brightness, orientation lock, and other widget controls.
Bonus tip: iOS 4.2 changes the hardware orientation lock switch to a mute switch so you need to use the widget above to do orientation lock now. (Steve please fix this!)
Triple click Home Button
If you have enable accessibility options in Settings and your triple click the Home Button you'll either reverse the screen colors, go into zoom mode, or get a popup asking which of those options (or VoiceOver) you wish to turn on. (You decide what happens in settings).
Click and hold down Home Button
On iPhone 3GS and iPhone 4, if you click and hold down the Home Button, you get Voice Control. On iPhone 4S, you get the new and improved voice control, Siri
(IPad and iPod touch don't have this feature yet, but we're hoping they get it some time!)
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Senior Editor at iMore and a practicing therapist specializing in stress and anxiety. She speaks everywhere from conferences to corporations, hosts the ZEN & TECH podcast, and should be followed on Twitter @Georgia_Prime.