The Main Mixer : Automating mixer parameters

Automating mixer parameters
Automating mixer parameters works in the same way as with other parameters. Automation is part of the audio track or Mix channel automation track. See “Recording parameter automation”.
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This will create an automation lane (and track if needed) where you can record or draw automation.
When you select a sequencer track, the “Record Enable Parameter Automation” button is automatically enabled, allowing for parameter automation to be recorded. However, when recording automation for Audio Track channel strip parameters, you may want to disable the regular Record Enable button to avoid recording audio by mistake.

The Main Mixer : Automating mixer parameters