Mixing : Basic Mixing : VCA Master Tracks : VCA Slave Track Controls and Group Behavior

VCA Slave Track Controls and Group Behavior
When a group is assigned to a VCA Master, the VCA-modifiable controls (Volume, Mute, Solo, Record Enable and TrackInput) on its slave tracks, by default, do not follow any grouped behavior that may be set in the Attributes page of the Groups dialog. This lets you control the output levels of the group’s member tracks while retaining the ability to adjust individual member track levels.
Slave tracks can be set to follow normal grouped behavior. See Assigning Groups to VCA Masters.