[Stone Knife]

There is this to consider, too (on the related topic):

Monitor Levels for Record and Playback

Pro Tools remembers two different fader levels for each audio track: one for when the track is record-enabled, and one for when it is not record-enabled. This lets you adjust levels for playback and configure a different set of levels for monitoring while recording.

Pro Tools remembers these two states for fader levels automatically. If you adjust a fader when a track is record-enabled and then take the track out of record-enabled mode, the fader updates accordingly.

When audio tracks are record-enabled, their volume faders in the Mix window turn red, indicating that the record monitor level is active.

Link Record and Play Faders

When the Operation Preference for “Link Record and Play Faders” is selected, Pro Tools does not keep track of record and play levels for audio tracks. In this case, record enabling an audio track has no effect on the fader level for the track.