When unidirectional flushing, it would be extremely helpful to be able to move flushing events between flushing areas. For example, if one area's flushing sequence is too time consuming to be done in one day, the events at the end of the sequence could be moved (via checkboxes, perhaps) to the next area in the sequence, or any selected area of preference.

Additionally, if you have two separate flushing areas that are both short lengths of time (e.g., 2.5 hours and 3 hours of flushing times in each area, respectively), it would be helpful to combine the events in both areas into one single area (totaling 5.5 hours of total flushing time).