After opening Purchase Order you can view it's detail & also you can view,

To view Purchase Order allocation details,

• Click on the “Purchase Order Allocation” link
• On the MRN Consolidation Reference window it will automatically fill Reference Number(PO number) you can change it to other number if you wanted.
• Click Send To button.

• Choose file type PDF & click open

• After clicking open button you can view PO allocation details on PDF viewer.