GarageBand '11: Add chapter titles
You can add a chapter title to a marker region (in a podcast project) or a marker (in a movie project). Adding a title to a marker region or a marker makes it a chapter marker.
When you view the movie in iTunes or iDVD, or view it as a video podcast, you can view the chapter markers, and move to the next chapter marker by clicking the Next button.
To add a chapter title to a marker:
Double-click the podcast track or movie track to open the editor.
Select the placeholder text in the Chapter Title column of the marker’s row, and type a title.