Apple GarageBand '09 - Manual (Page 101)

Chapter 9 Tutorial 7: Mixing and Adding Effects 101
3 Select the checkbox for the parameter you want to automate. You can select multiple
checkboxes to add multiple effect parameters.
4 When you’re done, click OK.
The parameter appears in the pop-up menu, and the automation curve switches to
show the automation for the last selected effect parameter.
You can also lock automation control points to regions, so that when you move the
region in the timeline, the control points move with it.
To lock automation control points to regions:
m Choose Control > “Lock Automation Curves to Regions.”
All control points are locked to the region corresponding to the automation curve.
The following conditions apply to locking control points to regions:
 Shortening or lengthening a region has no effect on its control points.
 Deleting a region deletes its control points as well.
 If you overlap a region containing control points with another region, the control
points and the region are shortened.
 If you drag a region containing no control points over part of a track containing
control points, the control points are locked to the new region.
 Looping a region does not loop its control points–you must copy the region instead.
To delete an automation curve for an effect parameter:
1 From the pop-up menu on the left side of the track’s automation row, choose Add
Automation.
2 When the menu appears, deselect the checkbox for the parameter you want to delete.
You can select multiple parameters.
3 When you’re done, click OK.
Note: When you delete an automation curve, all the control points on that curve are
also deleted. This cannot be undone.