You can access the Delivery Method page via Settings | System | Delivery Methods.
The Delivery Methods page provides a field to record the customer's choice of delivery; either by ;
This is a field in the order header which gives you the ability to set up different delivery methods to be used on each order.
You can remove Delivery Methods by clicking on the Delete icon — at line level — where available.
Once you have used the Delivery Method, you will not be able to edit or delete this as Unleashed needs it for historical records.