Dynamic OMR Markings

Hi, 

We have created a RTF template which we will be using for invoicing. These invoice needs a dynamic type of OMR markings depending on the machine's setup. There are currently 4 machine setups. I have attached a PDF (OMR Setup.pdf) which discusses how each mark should be presented on each page. 

Our initial solution is that we placed a static mark on the RTF that is consistently there (START line). We then provided different images of the different marks, depending on the machine setup,  to be written by the watermark feature of the PDF API on the document only on the last page. This has been successful for the 3 setup (Basic, Safety on - Parity off and All commands). However, the problem is one of the OMR setup  (Parity command activated, Safety command deactivated) requires one of the line (Parity line) to disappear on the last page. Because the watermark function