Left click on the order in the main calendar. The border changes to a dotted line, indicating the order box is selected. 
Position the mouse over the center of the order in the calendar. The cursor appears as the normal pointer. Left click the mouse and drag the order box to the new location.
A pop-up window appears prompting you to enter a reason for the rescheduling. Select a reason from the list and click OK. This reason is recorded in the log files and available for administration reports.
The order box appears with hash lines while the server is confirming the new date and time. When the hash lines disappear, the operation is complete.