If you want to modify SAP styles, set up your development environment as follows:

1. Make sure that no SAP standard styles are stored as client-dependent copies in your development client.

Such styles should be stored only in client 000, which is the SAP development and installation client. If you access SAP standard styles from within another client, the system uses the central copy from client 000.

If you must delete SAP standard objects from your development client, read Notes 10388 and 3355 in the SAP Online Service System (OSS). These notes describe how to save edited styles and then delete all styles.

2. If you want to modify SAP standard styles, first copy them from client 000 to your development client. Then proceed as follows:

• Assign a name from the name area reserved for customers to these objects (these names start with Y or Z).
• Copy these objects into one of your own Y or Z development classes.