I use the control room to do this when comparing my track to a reference track.
- Enable control room.
- Create cue send 1 in control room.
- Route reference track to cue send 1 by enabling cue sends on the reference track.
- Disable the normal “stereo out” out put at thrisk top of mix console.
- Set up a key command to switch between Main and Cue 1 monitoring.
This is for me the best use of control room. Awesome feature to listen to reference track without the effects you put on your master bus etc.