Apple Logic Pro 9 - Manual (Page 822)

To adjust the track automation data for an entire automation lane
Do one of the following:
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Hold down Command while dragging vertically in the numerical value display.
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Hold down Command while dragging vertically in the value slider.
Note: When you hold down Command, a short-click in the numerical value display or
the value slider selects the current parameter automation data on that track. If the track
is part of a track group, a long-click selects the current parameter automation data on all
tracks in the group.
Snapping Automation to Grid Positions
You can snap both track-based and Hyper Draw (region-based) automation to grid
positions.
To automatically snap automation nodes to the chosen Snap grid value
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Choose Snap Automation in the Snap menu.
Note: Automation edits always snap to an absolute position, regardless of whether or
not the Snap to Absolute Value option is enabled.
Offsetting Automation
Although automation in Logic Pro can be sample-accurate, it may be affected by audio
hardware latencies, excessive processor loads, or plug-in delays. To ensure that your
automation happens “on-the-money,” you can move it slightly forward or backward in
time (if Snap Automation is enabled).
822 Chapter 28 Working with Automation