The Ontology Navigator displays the different ontology projects and their corresponding ontologies:
You can navigate within the hierarchically arranged elements. Each project can contain several ontologies. For each ontology, classes can be found in the classes folder, properties in the properties folder, and so on.
Furthermore, you can create, change and delete ontology elements. The different options for editing the elements are listed in the appropriate context menu. To open the context menu of an element, make a right mouse click on the element. If an element contains further sub-elements, then a plus sign is displayed on the left side of the element. Click on this plus sign to display the sub-elements. To close the view of the sub-elements, click on the minus sign next to the upper element.