Sales > PDF Print-outs
To access the store configuration settings, choose Stores > Settings > Configuration from the Admin sidebar.
Invoice
          
          
Display Order ID in Header
            Store View
            Includes the Order ID in the header of invoices for reference. Options: 
          Yes / NoShipment
          
          
Display Order ID in Header
            Store View
            Includes the Order ID in the header of shipment packing slips for reference. Options: 
          Yes / NoCredit Memo
          
          
Display Order ID in Header
            Store View
            Includes the Order ID in the header of credit memos for reference. Options: 
          Yes / Norecommendation-more-help
            
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