You can define whether and in which purchasing documents a field is relevant to printouts of changes or which texts are included in change notices.
The text output can be controlled via a text number (direct assignment) or a routine (indirect assignment).
This is done in transaction SM30 - T166C
Text number define in transaction OMF6
If you wish to define further fields as relevant to change notices, you must carry out the following activities:
1. Enter the table and field names
2. Select the document categories for which the field is to be relevant to change notices.
3. Assign a text number or routine
If you have specified your own routine, you can evaluate it in the user exit
EXIT_SAPLMEDRUCK_001.