OK I am editing on a macbook. Footage shot on my iPhone. I have the initial video, but added in a sound clip of narration. I need to adjust the volume so that I can mute the background noise of the original video while narration is speaking. I know this is normally an easy task but the volume adjustment bars aren't there on my project as you can see in the picture above. I think this is because of how I added the video. I just dragged it from a folder on my computer straight into the editing area it is now, which I THINK has an effect on the volume not being there? The sound is there when the clip plays, there is just no option to edit it. help please!!