Existing purchases for the marked events are displayed at the top right. Open individual purchases with a double click if required.

1. Select at the top right under Delivery typewhether you would like to see existing order, confirmation, delivery and/or invoice and confirm with  Apply. The last selection is automatically retained for the next access.
2. In the main window in the "Open" column , the quantity of a requirement item that is not yet covered is displayed. The requirement is considered open until one or more purchase orders are created with a sufficient quantity of items. 
3. To see which and how many items are covered by an existing purchase order, select the delivery in the top right-hand window by left-clicking on it.
4. In the main window, the value in the "Open" column changes: The quantity/number that is not covered by the selected delivery appears.
5. To display the current status of open items again, including all existing orders, select all deliveries with the Shift/Ctrl key and left-click or Ctrl+A.