[WiseWeasel]

You can hit the 'lock' button to switch the orientation to landscape.

[CamperBob]

On an iPad, but not on an iPhone.

[WiseWeasel]

Yes, on the iPhone. It's red, in the upper left corner. Once you unlock it, it'll follow the device's orientation.

[CamperBob]

Ah, I see what you mean - I thought we were talking about the rotation lock for the phone itself.