SAP Note 23688 - PA-TRV: customer enhancement screen, user data

Symptom:

In PR01 (Maintain trip data) a customer wants to use the user data
screen. However, there is no documentation on this.

Cause and prerequisites

In 2.1 and 2.2, the documentation can be called up using 'Extended
help'. As of 3.0, you should read CHAP.REIS9999 in RPDSYS00.

Solution
The documentation reads as follows:

Customer enhancement screen
-------------------------
In HR-TRV, it is easy to create an individual screen which meets the
specific requirements of your company.

The internal table USER can be used for this purpose. This table is
written to the database by the standard SAP programs and read there.
This table can be modified by users: it has been specially devised for
applications particular to individual customers.

To do this, you will need to have basic knowledge of the SAP
development environment. This includes knowledge of ABAP/4, DDIC,
Screenpainter.
In this way, you can enter information which can be used again and again (ranging from the reports of sales reps. in the pharmaceutical and insurance industries) to facts determined with regard to customer- specific subsequent systems.

Example: services that can be billed to customers.