Your iTunes music library will appear in the browser. You can now try out different songs (or even whole playlists) to see how they work with your visuals. Or if you prefer, you can drag individual audio files or folders full of audio files from the Finder into the browser and have easy access to them when you are working on iDVD projects. Once you've selected a good choice for your slideshow or menu, just click the Apply button or drag the tune/playlist directly from the Media browser to the audio well in the slideshow editor to add your audio.
Additional Information
A note about copyrighted material
This software may be used to reproduce materials. It is licensed to you only for reproduction of non-copyrighted materials, materials in which you own the copyright, or materials you are authorized or legally permitted to reproduce. If you are uncertain about your right to copy any material, you should contact your legal advisor.