music from iTunes on mac to ipad

iOS: How to transfer or sync content to your computer - http://support.apple.com/kb/HT1296 - "Learn how to configure sync in iTunes to transfer content between your iPhone, iPad, or iPod touch and your computer. In addition to creating a backup, a sync with your computer allows you to manage contacts, calendars, and bookmarks on your computer." Plus information on syncing manually and using autofill in manual mode.

You can sync everything or selected playlists. "WIth iTunes 10 [and above], when automatically syncing, you can also manually drag items to the iDevice. These will show up in Manually Added Songs at the bottom of the Music tab after Playlists, Artists Genre, Albums." - https://discussions.apple.com/thread/4107492?answerId=18919754022#18919754022