Invoice Data Entry - Supporting Documents

From Invoice Entry - Once the invoice is coded, selecting Supporting Docs will list all supporting documents "Supp Docs Button"  that match the coding of your invoice.
  This invoice is coded to a specific vendor.  Selecting Supporting Documents will list only documents for that vendor.
All supporting documents that could relate to the invoice will display.
Select the documents that actually relate to the invoice. 
The help manual was created with Dr.Explain