Apple Logic Express 8 - Manual (Page 610)

610 Chapter 26 Working With Automation
To set the same automation mode for selected channel strips:
1 Choose the desired channel strips by Shift-clicking on their names in the Mixer.
2 Choose the desired automation mode in the Automation Mode menu of one of the
selected channel strips.
Setting the Automation Mode Via Key Commands
You can also set the automation mode with the following key commands.
 Toggle Current Track Automation Off/Read
 Set Current Track to Automation Read
 Toggle Current Track Automation Touch/Read
 Toggle Current Track Automation Latch/Read
 Toggle Current Track Automation Write/Read
 Set All Tracks to Automation Off (default: Shift-Control-Command-O)
 Set All Tracks to Automation Read (default: Shift-Control-Command-R)
 Set All Tracks to Automation Touch (default: Shift-Control-Command-T)
 Set All Tracks to Automation Latch (default: Shift-Control-Command-L)
 Set All Tracks to Automation Write
Choosing Automation Modes
You can choose from the following automation modes in any channel strip:
Off
Off will disable the current track automation data without deleting it. No automation
data will be written, read, or played back. If the current automation mode is Off, any
edits to track automation data in the Arrange area will automatically switch the
automation mode to Read. This ensures that the data, as currently edited, will be
played.
Given that track automation can be recorded during playback mode, Off is the default
setting, as any mix automation recording may prove disconcerting while arranging.
Read
Read mode will automate the current track, using the existing automation data.
The data can not be changed by moving the channel strip controls, or using an
external automation controller, when in Read mode.