Dear Charlie,
I checked your screenshot, you are referring the incoterms header level.
The info record value will not fill or adopt to the header level but only at item level.
For header level for the said field, it will adopts based on priority as below:
-In reference to PO document(Highest)
-contract
-rfq
-Vendor master record purchasing organization data, table lfm1-inco2 .(lowest)
Best Regards,
ian Wong Loke Foong