Group Channel Tracks
You can use group channel tracks to create a submix of several audio channels and to apply the same effects to them. A group channel track contains no events as such, but displays settings and automation for the corresponding group channel.
For easy management, all group channel tracks are automatically placed in a special group track folder in the track list. Each group channel track has a corresponding channel. A group channel track can have any number of automation tracks.
You can add group channel tracks via the Add Track dialog.