The DB Adjust Payment window can be accessed by clicking on the
button on the DB Manual Payment form, as detailed in the Maintaining Manuals Payments section:

The buttons displayed on this window are as follows:
: This will close the window and you will be returned to the DB Manual Payment form
: This button will only be enabled where the status of the Manual Payment is
. When enabled clicking on this button will open a DB Adjust Payment - Allocate window. 
Click on the Allocate To drop-down field and a list of possible Invoices that the remainder of the Payment Reversal can be allocated to will be displayed.
Select one of these options and click on the
button.. Then click on the
button and you will be returned to the DB Manual Payment form. The status will now be displayed as
.
: Clicking on this button will open the DB Adjust Payment - Cancel window:
Select a reason option from the Reason drop-down field, and add text to the Comments field, if appropriate. Click on the
button and the Manual Payment will be cancelled.
Please note: this functionality is not currently available.
: Clicking on this button will open the DB Adjust Payment - Refund window:
Please note: the functionality on this window is not currently available.