To rephrase my question: When an appointment has been changed, is it possible to tell if the change was a resize or a drag & drop? I’m implementing the onAppointmentChange event handler and actually have come up with a workable solution that calculates the duration of the target appointment and compares that to the original appointment (if both durations are the same, then it was not a resize). I can now distinguish between whether an appointment has been resized or dropped, but it would be nice if there was a way to distinguish this without calculations