Here you can choose how the program will apply entries for this vendor.
You can choose between Manual and Apply to Oldest. Your choice will have the following effect:
Manual means that the program will apply payments only if you specify a document.
Apply to Oldest means that if you do not specify a document for the payment to be applied to, the program will apply the payment to the oldest of the vendor's open entries.
To determine the application method, click the AssistButton to the right of the field and select one of the two options:
Manual
Apply to Oldest
If you do not enter anything here, the application method will be Manual.