Mixing : Automation : AutoMatching Controls : AutoMatching All Controls

AutoMatching All Controls
You can AutoMatch all currently writing controls to their existing automation levels.
To AutoMatch all currently writing controls:
1 Choose Window > Automation.
2 Make sure the automation types you want to AutoMatch are write-enabled.
3 Start playback.
4 When you reach a point in the track where you want to return control to their previously written values, click the AutoMatch button in the Automation window.
All currently writing controls stop writing automation and return to any previously written values according to the AutoMatch Time setting in the Mixing preferences.