To add a global group to your message model:
Switch to the Enterprise Service Tools perspective.
In the Outline view, right-click the Groups folder, then click Add Group on the pop-up menu. A global group is added to your message model and is assigned a default name.
Either type a new name for the global group or press Enter to accept the default.
You can now configure the global group to your requirements. For further information on configuring message model objects see Configuring message model objects.