This isn't so with the iPad, however; iPad screens can be locked in both landscape and portrait modes. And it will lock in whichever mode you're holding it while you set the orientation lock.

To rotate the screen with the Settings app, use these steps: Landscape. Portrait. Landscape (flipped). Portrait (flipped).

While we're all used to seeing PowerPoint slideshows in landscape orientation, every so often, a presentation may need to be in portrait format. The process to change your slide orientation looks ...