How to attach document with Bill of supply?

When creating a Bill of supply, there is an option to upload the document. Click on Upload Document.

Option of Uploading Document will show the number of documents attached and if you want to delete the attached document then click on the delete button. After that save the Bill of supply as Approve.

From the listing page of Purchase Invoice, open Awaiting Payment Bill of supply in View mode and click on the uploaded document then it will show the attached document. If you want to see the attached document then click on view