iTunes can create backups of settings and certain other information on iPhone and iPod touch. You can use a backup to restore this information to your iPhone or iPod touch after a software restore or update, or to transfer the information to a different device. Backups can be deleted from iTunes using the steps below.

You can rent movies from iTunes and watch them with your Mac or Windows computer, iPhone, or a supported video-enabled iPod*, or on your TV using your Apple TV. * Supported video-enabled iPod models are: iPod touch, iPod nano (3rd generation), and iPod classic. See this document if you're unsure which iPod model you have. Playing rented movies on Apple TV requires an update to Apple TV software.  For latest information, please visit http://www.apple.com/appletv/  

If you have Spoken Feedback enabled on your iPod nano (4th generation) and you have just heard a congratulatory audible message after reaching a new workout milestone, your iPod nano may unexpectedly reset and lose the data for your last workout.

This article gives an overview of how to set up iPhone or iPod touch to sync with your computer, and where to get additional information. When you connect iPhone or iPod touch to your computer, items are automatically synced according to your preferences set in iTunes. You can, for example, enter phone numbers and addresses of friends and family members on your computer, connect iPhone or iPod touch to sync, then unplug iPhone or iPod touch and tap a friend's name on the touchscreen to call. You can sync Contacts—names, phone numbers, addresses, email addresses, and so on Calendars—appointments and events Web bookmarks Music and audiobooks Photos Podcasts Movies and TV shows Applications You only have to set which items are synced in iTunes on your computer once. After that, just connect iPhone or iPod touch to start a sync. Contacts, calendars, and bookmarks are synced from (or to) your computer, so if you add, change, or delete them on iPhone or iPod touch, they are changed on your computer, and vice versa. You can also sync contacts with your Yahoo! or Google Address Book. Email account settings (on iPhone only), music, movies, TV shows, podcasts, and photos are synced one-way, from your computer to iPhone (though you can import photos taken with iPhone to your computer). If you like, you can set iPhone or iPod touch to sync with only a portion of what's on your computer. For example, you might want to sync only a group of contacts from your address book, or you may want to sync only songs from certain playlists so you don't fill up iPhone or iPod touch with all your music.

Gapless playback means that there is no pause in playback between the end of one audio file and the beginning of the next audio file. This allows for playback of content with no gaps the way it was meant to be heard. Some examples of gapless albums include: "Dark Side of the Moon" by Pink Floyd "Abbey Road" by The Beatles Many live and classical albums