Apple iMovie '08 - Manual (Page 35)

Chapter 2 Learn iMovie 35
You can preview any sound file by double-clicking it.
3 Select a music file and drag it to the project background, being careful to avoid
dragging it onto any clip.
A green background music icon appears behind the video clips, starting at the
beginning and continuing for the duration of the song or the video, whichever ends
first. If the music extends beyond the video, a music indicator appears at the end of the
video. The music automatically fades out at the end of the video.
4 If you want to adjust the startpoint and endpoint of the background music, click the
green background, and then choose Edit > Trim Music.
The music trimmer opens, displaying only the background music clip. Inside the music
clip is a waveform; wherever the waveform is pink, there is accompanying video, which
you can see in the viewer by skimming over the music clip. The black waveform
indicates the part of the music clip that extends beyond the startpoint or endpoint of
the video. If you add more clips to make your video longer, the background music
automatically covers the additional video.
Background music
Music indicator
Handle for music
endpoint
Handle for video
startpoint