...
The Customer Order field is populated automatically with the customer order Customer Order if this purchase order is based on it Purchase Order is linked to one. To populate the purchase order with Purchase Order with the data from the customer order Customer Order, click the Fill (
) button.
The Requisition field is available if the Enable Requisitions option is selected on the Administration > Settings > Purchasing and Warehouses form. The Requisition field is populated automatically with the Requisition if this Purchase Order is based on itlinked to one. To populate the Purchase Order with the data from the Requisition, click the Fill () button.
...