Hi Rebecca. I am a little unclear on your request. Are you looking for a way to cancel appointments, or perhaps move them to another practitioner's column, and then rule out a column in the instance that one of your practitioners is sick? As you have alluded to, the easiest way to do this is to cancel/move the appointment to another column, and then immediately add a casual appointment or a manual rule out to the diary. We are not too open to the prospect of double bookings, and further, I'm not sure if this is the right solution for your issue.