As of Release 3.0A, you can also print the long texts for the document type (T003T-LTEXT) and the posting key (TBSLT-LTEXT) in the dunning form ('MAIN' window, element 531). To do so, you must include fields T003T-LTEXT or TBSLT-LTEXT in text element 531 and change the heading in element 530 to match the new printout.
As both fields are 20 characters long, you must ensure that there is sufficient space in the dunning form for them. In addition, the tabulators in both text elements (530 and 531) must be reset.