If you have multiple regions or communicate with other regions, you can set the domain ID and put titles on the panels.
The NMDID JCL parameter identifies the domain ID for each region. If you have multiple regions, ensure that you have a different domain ID for each one. For more information about the NMDID parameter, see the Reference Guide.
You can use the SYSTEMID (System Identifications) parameter group in Customizer to help identify your regions. This parameter group specifies a system identifier that is used when you link to other regions. Ensure that each of your regions has a different system identifier.
This parameter group also specifies the titles to display on the logon panel and the OCS console panel. This helps users to identify the region that they have logged on to.
Note: The system ID parameter takes effect when the region is initialized.