Ipad App: How to react on roatation?

I have a few labels on my first Ipad App. How to make them rotating? When I rotate the IPad, the Label is still the same position as before, it dowsn't rot开发者_高级运维ate with.

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This stuff is pretty much page 1 of the documentation. Apple wrote it for a reason.

http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/BasicViewControllers/BasicViewControllers.html#//apple_ref/doc/uid/TP40007457-CH101-SW23