At its debut, the iPad offered a hardware-based screen orientation lock, while the iPhone used a software-based lock that was introduced in iOS 4. With the introduction of iOS 4.2, though, the hardware-based approach as removed from the iPad, leaving both devices to lock their screens in the same way.
- To access the screen orientation lock, begin by double clicking the home button on the front center of the iPad or iPhone’s face. This will bring up the process menu, listing your apps.
- Slide the list of apps to the right. This should reveal the iPod app, iPod controls, and an icon with a circle-shaped arrow on it. This is the screen orientation lock.
- Tap it to lock the screen to its current orientation. Tap it again to unlock.
- When you’re done, single click the home button again to be returned to your apps.