ADDING CLIPS TO the timeline, trimming them, and adding titles and transitions are the nuts and bolts of making movies in iMovie. Once you’ve got the hang of those, you’ll be able to make great–looking videos. But there’s a lot more to iMovie than that. We talked in the introduction about trailers, and we’ll show you how to make one here. Trailers are a great introduction to storyboarding, since the templates are presented as storyboards with placeholders for you to add your own content.