Mixing : Automation : Writing Automation : Automating Switched Controls

Automating Switched Controls
When automating switched controls (such as mutes, plug-in bypasses, or switched controls on plug-ins) Pro Tools treats them as touch sensitive controls. Automation data is written for as long as the switch or button for that control is pressed or touched.
For example, if you have just written a series of mute on/off states on a track in quick succession, the manual method for clearing this automation data would require you to move to the Edit window, choose automation playlist for Mute, select the mute automation data, and delete it. In Pro Tools, this can be done automatically.
To automate a switched control (such as the Mute button):
1 Perform another automation pass on the track.
2 When you reach the location of the mute state you want to remove, hold the switched control (such as the Mute button).
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When playback gets to the first muted section, the Mute button becomes highlighted.
3 As long as the button is held, Pro Tools overwrites the underlying data on the track with the current state of the switch (on or off) until playback is stopped.