Apple Final Cut Pro 7 - Manual (Page 143)

Track Display
The Track Display settings allow you to customize many aspects of how tracks appear in
the Timeline.
• Show Keyframe Overlays: Select this option to display opacity overlays (thin black lines)
over your video tracks, and audio level overlays (thin red lines) over any clips in the
audio tracks of the Timeline. These lines indicate video transparency or audio levels.
For more information, see
“Adjusting Parameters for Keyframed Effects.”
You can also use the Clip Overlays control in the Timeline to show or hide overlays.
• Show Audio Waveforms: Select this option to display audio waveforms superimposed
over audio clips in the Timeline. You can also switch audio waveforms by pressing
Option-Command-W. This option is also available in the Track Layout pop-up menu in
the Timeline.
Audio waveform
Without audio
waveform
143 Chapter 9 Timeline Basics