We've set-up an American Express account, so that we can capture the detailed expenditures on our corporate card in A/P.   All invoices paid with AMEX will be keyed as "Misc Pmts".  

When i create a new batch ((to key the new month's AMEX expenditures)), I will select our new Bank Code "AMEX" -- which will be the Bank Code for that entire new batch. 

How do I assign a specific Payment Code ((in our case, the payment code is also named AMEX)) to the newly-created Bank Code "AMEX"?   

I'm trying to avoid having to remember to change the "Payment Code" to AMEX on every single invoice line in my AMEX batch. 

If I choose BANK CODE "AMEX", I want the default PAYMENT CODE for that entire batch to be "AMEX".  ((Instead, it keeps defaulting back to Payment Code "Check" when I add a new invoice to the batch.))