To create a pre-order (future order) via dispatch panel first of all make sure that this feature is enabled. Proceed to the company panel "Service Types" tab and check the status of pre-orders feature (Instant or Delayed broadcast should be enabled) 

Now while creating an order via dispatch panel simply click on the date&time's field and choose the details of pre-order.

Pre-order can be done from 30 minutes in advance.

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