Since I'm not Apple friendly, but many readers artescritorio if I asked my buddy Rui to let me use his post on how to make a screenshot in iOS.
This information is not new, nor is nothing complex, but can be useful from time to time. Fits iPhone and iPod Touch and iPad:
Go to the application where you want to take the screenshot (screenshot)
Press the sleep button (yes, the top edge)
Press and release the home button (the round, bottom)
Listen for the sound as of a photo (and / or a flash on the screen)
Open the Photos app on your device. There you will have the screenshot you just did.
If you reverse steps 2 and 3, also works.