System information
For more information, see "Compositing and Masks" on page 385.
Adjusting mute automation
You can edit mute automation settings by adding a mute envelope to the track or by using the controls in 
the track header.
1. 
Select the Automation  Settings button  . The Mute  button is displayed as  .
2. 
Click the Mute button   to change the track's mute automation state.
The button behaves differently if the track has a mute envelope and when you change the track 
automation recording mode:
n  When the track automation mode is set to Off, the button mutes the entire track.
n  When  the track has a mute envelope and the track automation mode is set to  Read, the 
button  changes state to reflect the envelope setting during playback but cannot  be adjusted.
n  When  the track has a mute envelope and the track automation mode is set to  Touch or 
Latch, the button edits  the envelope setting at the cursor position.
For more information, see "Recording Track Envelope and Keyframe Automation" on page 270 and"Video 
Track Automation" on page 260.
Solo a track
Select the Solo  button   to mute all  unselected tracks. Click the Solo  button on additional tracks to add 
them to the solo group. To remove a  track from the solo group, click the Solo  button again.
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