People who choose to autosync their iPods don't have to worry about dumping stuff off their players. They can choose which playlists and media to automatically copy over to the iPod—or they can just delete unwanted items out of iTunes and resync to wipe the same files off the player.
If you're a Manual Manager, you have to delete unwanted files yourself. (You can, however, have iTunes automatically update your podcast subscriptions for you; see Chapter 7 for more about podcasts.)
❶ To delete files from your iPod, connect it to the computer, and click the iPod icon in the Source list.
❷ Click the flippy triangle next to the iPod icon to get to the media library you want to clean up. If you want to delete some songs, for example, click the Music icon.
❸ In the list that appears on the right side of iTunes, select the unwanted songs and press the Delete key on the keyboard. This removes the files from your iPod, but doesn't whack them out of the iTunes library.