You can register a toolset with the main window or with a module. If you register the toolset with the main window, the toolset will be persistent throughout the session; for example, the File toolset is always available in an ABAQUS/CAE session. In contrast, if you register the toolset with a module, the toolset will be swapped in and out with that module's menus and icons; for example, the Datum toolset is available in an ABAQUS/CAE session only in selected modules. For more information, see “Registering toolsets,” Section 8.2.5.