Mixing : Automation : Automation Modes : Trim Automation Modes

Trim Automation Modes
When a track is in a Trim automation mode (except for Trim Off) its main Volume faders and all Send level faders are displayed in yellow. When trimming, a track’s Volume indicator or Send Level indicator shows the delta value being written rather than the absolute value.
Behavior of the Trim Automation modes also depends on the Coalesce Trim Automation preference setting. See Coalescing Trim Automation.
Trim Off
Trim Off turns off reading and writing of all automation (main and trim) for a track. All automation moves are ignored during playback. Trim faders are temporarily set to zero when a track is set to Trim Off mode.
Depending on the Coalesce Trim Automation preference setting, changing a track to Trim Off can coalesce Trim automation on that track. See Coalescing Trim Automation.
Automation can be switched from Trim Off to another Automation mode during playback or record.
Read Trim
In Read Trim mode, Volume and Send level Trim faders are disengaged from the main automation playlist and follow any existing Trim automation. You can move a Trim fader during playback to audition new trim values, but no automation is written. When the Trim fader is released, it returns to any previously written Trim automation values.
If a track does not contain Trim automation, you can move a Trim fader during playback to audition new trim values, but no automation is written. The Trim fader retains its position until the track is removed from Trim mode, or if you manually coalesce the Trim level.
When this mode is enabled, non-trimmable controls (all controls other than track volume and send level) behave as if they are in regular Read mode—no automation data is written.
Touch Trim
In Touch Trim mode, Volume and Send level Trim faders are disengaged from the main automation playlist and follow any existing Trim automation. When a Trim fader is touched, writing of Trim automation begins. When the fader is released, writing stops and the fader returns to any previously written Trim automation values.
The rate of the fader’s return to previous trim values is determined by the AutoMatch Time specified in the Automation Preferences page. See AutoMatch Time for more information.
When this mode is enabled, non-trimmable controls (all controls other than track volume and send level) behave as if they are in regular Touch mode—they follow the previously written automation until touched. When they are touched, their absolute positions are written until the control is released or until playback stops.
Latch Trim
In Latch Trim mode, Volume and Send level Trim faders are disengaged from the main automation playlist and follow any existing Trim automation. When a Trim fader is touched, writing of Trim automation begins. Writing of Trim automation continues until playback stops, or until you punch out of writing automation.
When this mode is enabled, non-trimmable controls (all controls other than track volume and send level) behave as if they are in regular Latch mode—they follow the previously written automation until touched. When they are touched, their absolute positions are written until playback is stopped.
Touch/Latch Trim
In Touch/Latch Trim mode, Volume and Send level faders are disengaged from the main automation playlist and follow any existing Trim automation. The main Volume Trim fader follows Touch Trim behavior, and Send level Trim faders follow Latch Trim behavior.
Write Trim
In Write Trim mode, as soon as playback begins, writing of Trim automation begins for Volume and Send levels, and continues until playback stops, or until you punch out of writing automation.
When Write Trim mode is enabled, non-trimmable controls (all controls other than track volume and send level) are not in Write mode, but behave as if they are in regular Touch mode (no automation is written unless a control is touched). This is to prevent the controls from overwriting all of their automation data on every pass in Write Trim mode.
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The “After Write Pass, Switch To” preference affects Write Trim mode. After an automation pass in Write/Trim mode, tracks automatically switch to the Trim mode version of the setting specified by this preference.