As shown above, you can add session nodes and catalogues to corpus nodes. Moreover, you
can also add additional elements to session nodes and catalogues. If you right click on a
catalogue and select Add, you will see a list of items
available in the context menu. Notice how some elements have the 
icon, whereas others have a
icon. The
icon
represents a component that will be displayed in the hierarchy, whereas the icon adds a new field (see section
below).
