Apple Final Cut Pro X (10.0.9) - Manual (Page 160)

Chapter 9 Edit audio 160
Show expanded audio components
You can expand the audio portion of clips in Final Cut Pro to view and edit audio components.
You can show expanded audio components for synchronized clips, multicam clips, and
compound clips.
Do one of the following:
m Select the clip in the Timeline, and choose Clip > Expand Audio Components (or press
Option-Control-S).
m Double-click the audio portion of the clip in the Timeline while holding down the Option key.
Normal clip view
Audio components
Collapse audio components
Do one of the following:
m Select either the clip or one of its audio components in the Timeline, and choose Clip > Collapse
Audio Components (or press Option-Control-S).
m Double-click any of the audio components in the Timeline while holding down the Option key.