Enhancing an Infotype Included in the SAP Standard System 
Use
The enhancement concept for infotypes within Personnel Administration and Recruitment offers you the following functions:
For more detailed information, please see Extended Help under the Enhancement transaction (transaction code CMOD).
The enhancement concept allows you to include additional fields in the data field structure Psnnn. You can then maintain these fields in the standard individual screens.
See also:
It is also possible to include additional fields in the standard list screens.
See also:
Enhancing List Screens
If you incorporate additional fields in an infotype, these will be treated in the same way as the SAP standard fields in reporting, when creating the documents, and within dynamic events.
The enhancement of an infotype in the SAP standard system does not cause problems during a release upgrade.
Constraints

Delete enhancement for infotypes:
To delete the infotype enhancements, use the following procedure: reset enhancement: