Adjusting the Volume

To change the computer's volume (not the movie), you can click on the speaker in the top right corner of the screen and drag the blue bullet up or down.

To change the volume for the entire movie, drag the volume slider in the iMovie window.

To change the volume for a clip or portion of the movie. In the Timeline viewer, at the bottom, there is a volume slider for each video and audio clip. Select an audio clip then drag the volume slider to change the volume for a clip or portion of the movie.

Click here to play the example. – MOV-File, 1.6 MB

You can also mute one or more of the 3 audio tracks with the checkboxes at the right side of each track.