The Move Order button allows you to move an order from one table to another.
Click on the order that has the item that needs to be moved.
The order will become highlighted in green and appear in the open ticket list window on the right.
Click the Move Order button.
You can then pick your new table or defined name to move the order to.
If there is already an order at that table, the moved order will become a child order of the existing order. The open ticket list and order should now reflect its new table or defined table name.
Moving an order that isn't yours claims it for you and makes it your order.