Solo, disable, and enable clips
Sometimes, it’s helpful to compare how a sequence plays with and without certain clips. In Final Cut Pro, you can quickly play one clip’s audio, excluding audio from other clips. This feature, called solo, works by disabling the audio in all unselected clips in the Timeline. You can also disable (rather than delete) selected clips, making them invisible and silent during playback. Disabled clips do not appear in any output. You can just as easily reenable them.
Solo selected items
When you want to focus on a subset of clips in the Timeline in isolation, you can select the clips and solo them.
In the Timeline, select the clips you want to isolate.
Do one of the following:
Choose Clip > Solo (or press Option-S).
Click the Solo button in the upper-right corner of the Timeline.
When solo is turned on, the Solo button turns yellow, and nonsoloed clips are shown in black and white, making the soloed clips outlined in yellow easy to identify.
To turn off solo, click the Solo button again.
Disable and reenable one or more clips
Select one or more clips in the Timeline.
Choose Clip > Disable (or press V).
Disabled clips are dimmed in the Timeline and are invisible and silent during playback.
To reenable the disabled clips, select them in the Timeline and choose Clip > Enable (or press V).