Enhancements using User Exits (Document) 
Use
In Customizing Document Management you can use user exits to create enterprise-specific enhancements and extensions for document processing. You can also use them to extend the standard SAP System with enterprise-specific checks or replace standard ones.
Integration
The enterprise-specific checks can be integrated by means of the ABAP workbench. As opposed to
Customer Exits you can use user exits to access program parts and data objects of the standard system.Some upgrades and support packages will however overwrite the modifications and the must be reentered later.

Verify after an upgrade whether enterprise-specific functions still exist or whether they cause conflicts.
Features
The following overview lists the possibilities for customer-specific changes. The documentation is in the IMG of each activity.
Function |
Activity in IMG Document Management |
Notes and indications to the SAP Library |
Create alternative screen |
Control data ®
Define document types (detail screen) |
The alternative screen is only read by the old transactions CV01 to CV03. |
Document number assignment |
Control data ®
Define document types (detail screen) |
See:
Document number |
Setting enterprise-specific additional fields |
Control data ®
Define document types (detail screen) |
See:
Additional Data for a Document |
Extensions to the object link |
Control data ® Define document type ® Navigation step
Determine object link |
See:
Adding Other Objects. |
Executing a workflow task |
Control data ® Define document type ® Define document status |
See:
Overview of Additional Functions After Status Changes
Processing a Document Info Record (CA-DMS) |
Executing enterprise-specific program routines |
Control data ® Define document type ® Define document status |
See:
Overview of Additional Functions After Status Changes |