To set new projects to be NTSC or PAL, follow these steps:
- Update to iMovie 3.0.3 or later. It is available from the iMovie website (http://www.apple.com/imovie/). iMovie 4 is available as part of iLife (http://www.apple.com/ilife).
- Open iMovie.
- From the iMovie menu, choose Preferences.
- Change "New Projects are:" to either NTSC or PAL.