Making a Movie in iMovie HD and iDVD 5: Visual QuickProject Guide

You can also split clips, just as if you were slicing a strip of film with a razor blade. I often split clips when I know I don't need an entire section, but don't want to click and drag with Direct Trimming.

I wanted only the second portion of this clip to appear in my movie, so here I've deleted the first segment. I find that splitting clips and deleting segments (or moving them to the Shelf) is often a faster way of trimming my footage.