In some cases you are not interested in viewing the nodes of the standard namespace, but you are interested in viewing only the user defined nodes in the treeview. For that reason you can start a dialog with Settings → Select Namespaces for Treeview. Here you uncheck the models which nodes you do not like to see.

If you change the selection and confirm with OK, the treeview will be reseted. Now only nodes of the selected models are shown as well as the super types of the types of the selected models and their components and properties.