4. Double-click one of the posting lines (or choose the magnifying glass icon) to display the details for that posting line. You can then choose Display Change (Shift+F1) to switch to the change mode and change certain details in the document, such as the terms of payment.
Alternatively, you can also go directly from the document overview to the change mode of a posting line. To do so, position the cursor on the posting line you require and choose Change Individual Line Items (Ctrl+Shift+F11).