How to Set Processing Options for Sage 300 Accounts Payable Steps: Open Accounts Payable>A/P Setup>Options.Click the tab that contains the options you want to change.Make your changes.Click Save to keep your changes.Note: You cannot save most changes to the A/P Options if any others Accounts Payable screens are open.Click Close when you are finished or to leave the screen without changing any information. Sage 300 Request Support