Adding and Changing Worksets in a Role 
Use
You can insert a workset in a role and change it within the role. This change is only valid for a workset in a specific role. It has no central effect. This means:
If, however, you change a workset centrally, this will affect all the roles to which this workset was added. Read also
Creating, Modifying and Copying Worksets.
If you are importing worksets delivered from SAP Portals into the Enterprise Portal and then making changes, only make these changes within roles. Never make central changes to a workset in the SAP Portals' namespace If you do so, all changes will be lost the next time that you import the workset. Read also
Prerequisites
You have created a workset and added it to a role.
Procedure
You can now change the workset in your role by:
Always use this method for worksets delivered by SAP Portals.