Apple Soundtrack - Manual (Page 98)

98 Chapter 6 Working in the Timeline
To solo a track, bus, or output (multiple solo):
m Click the Solo button. Click the Solo button again to unsolo the track, bus, or output.
To exclusively solo a track, bus, or output:
m Option-click the Solo button. Click the Solo button again to unsolo the track, bus, or output.
When you solo tracks, busses, or outputs, the ones not soloed appear darker in
the Timeline.
Changing Track Time Format
By default, tracks use the same time format as the project (Time-based or Beats-based).
You can change the time format of a track, which changes the behavior of tagged clips
when you change the project tempo.
When the track time format is Time-based, clips remain at the same time position (the
same second or frame) when you change the project tempo. When the track time
format is Beats-based, clips remain at the same beat position (the same measure, beat,
and beat division) when you change the project tempo.
When you set a track to Beats-based time format, a metronome appears in the corner
of the track icon.
To change a track’s time format:
1 Select the track.
2 Choose Multitrack > Track Time Base, then choose a format from the submenu.
Click the Solo button to solo
the track, bus, or output.