How to Add Themes in iDVD
iDVD is a program for authoring, or designing, a DVD. iDVD works well with iMovie (and also with iTunes and iPhoto). iDVD is based on the concept of themes (menu designs for your DVD), with differing background images, button styles, fonts, music, and animations.
Click the Themes button and scroll through the list on the right to choose a theme that meets your requirements. Keep in mind that many iDVD themes have menus with motion and sounds. You can turn motion and sound on or off by clicking the motion button (it’s the one with the two arrows that don’t quite complete a full circle) on the iDVD toolbar.
Many themes default to the widescreen 16:9 aspect ratio available on HDTVs (and some analog TVs). These themes work also in the standard (4:3) format. You can also choose themes from prior versions of iDVD (pre-7.0 themes).
You can drop content into designated drop zones. To add a movie to a drop zone, drag it from the Media pane or elsewhere on the Mac. If you add a movie with chapter markers, iDVD automatically creates a scene selection submenu with a left-pointing arrow that serves as a Back button.
You do have to share the movie in iMovie before you can do anything with it in iDVD.