To match a Bill with a corresponding Purchase Order, click on the button
and then select the matching pattern: either match many Bills to one PO, or one Bill to many POs.
Select which POs should be matched with a Bill. You can open the PO to see more details by clicking on the 'Open' button. When ready, click 'Done'.
The Bill Approver is offered to add the PO Requester as an Approver for the Bill:
All matching information is shown in the Bill:
If needed, the Bill Approver can change the matching to fix an error by clicking on the button.
The Bill Approver can also either remove the matching (untick the checkbox) or select a new PO to match with: