EDI Output Naming Convention on Report Style

I recently found out that you can add a {counter} to a report style’s output location to change the basic naming convention of output. For instance, you could do a 753 report style on a PackSlip report and edit the output to read \EpicorData\reports\EDI\753_{counter}.txt

Instead of the Packing Slip Print* output file you would normally get, you get 753_001, 753_002, etc.

Does anyone know what other variables you can use other than {counter}? My goal is to get a CustID or PackNum in the naming convention so I don’t have to set up a report style for every EDI customer.