It would be great if it were possible to have an option to remove all tracks from the play list in one go. At the moment you can only remove one track at a time.
ALREADY IMPLEMENTED
"You can achieve this by going to Manage > Playout Log and clicking Unschedule for the selected hour."
Comment on this feature request:
Cameron Claassens commented
You can do this with shift, select all tracks, and delete.