Each category, with the exception of Other Media and Now
Playing, contains subcategories.
The All Pictures category is created in the
Contents pane when you create a synchronization partnership with a device that supports picture viewing or when you
enable picture support for devices.
A category is created in the Contents pane after
you synchronize content to the device for the first time. The
category name is the same as the device name and the subcategories
are the playlists that you selected to be synchronized.
When you purchase files from online stores, links to the purchased files on
your computer are created in subcategories in your library. For
example, you can find the music files that you purchased in the
Purchased Music subcategory in All Music and the video files that
you purchased in the Purchased Videos subcategory in All