After you create automation points and curves, you can easily change things to meet your needs. You can copy automation within a track or between tracks and can move automation within a track. When moving a region, you can choose whether or not to move any existing automation with it. When deleting automation, you can delete individual or multiple automation points.
To select an automation point: Click it.
To add automation points to, or remove them from, the selection: Shift-click the points you want to add or remove.
To select a range of consecutive automation points: Drag in the background of the automation track.
Select the points or curves you want to copy, then Option-drag the selection to a different location on the track.
Any existing points in the target location are deleted.
Hold down Shift while dragging a selection within the automation area.
Choose Edit > Copy (or press Command-C).
Select the track you want to copy the automation to.
Choose Edit > Paste (or press Command-V).
Choose Mix > Move Automation with Regions.
Now, when you move or copy a region, the automation points stay with it.
Do one of the following:
Double-click the automation point.
Select the automation point, then press Delete.
Do one of the following:
Select multiple automation points, then press Delete.
Important: Make sure that no regions are selected, or they will also be deleted.
Choose Mix > Delete All Automation on Selected Track.