Default description for documents
Documents that are
      added with SyteLine document types, either manually
      or through auto-generation, use this format for the document's Description attribute:
      {id1}_{Entity_Type}, where {id1} is the number of the currently selected record.
    For example, if you are viewing PO #110675 on the Purchase Orders form, and you add a document in the Related Information context app, the new document's description by default will be 110675_InforPurchaseOrder.
You can only change the default description for the document from within the Document Management application.