Attaching files to Proposed PO Header Attachments Use this window to upload files required by the customer in the Proposed PO Header Attachments. Select Demand > Proposed POs > Proposed POs Management > Continue. The Proposed PO Management List page is displayed. Click Edit. The Proposed PO Management Edit page is displayed. Click . The Proposed PO Header Attachments window is displayed. Select the type of document in the Type field. Possible value: Default ForAllMandatory Select the Choose File option to attach the file in the Attach Document column. Click Validate. Note: You can view the list of files attached by the supplier in the Supplier Attachments section. You can delete an attached document using the Delete option.