Classes View Preferences let you control which built-in RDF, OWL and XSD classes will be shown in the Classes View. To access Classes View Preference dialog select Windows > Preferences... from the menu. Then find Classes View under TopBraid Composer. Another way of opening these preferences is from the drop down menu in the upper right corner of the Classes View.
This dialog can be used to hide or show the system classes such as owl:AllDifferent. If you are planning to develop OWL ontologies, you may want to leave all RDF and RDFS statements unchecked. Similarly, if you are building RDFS models, deselect all OWL options.
This screen also gives you the ability to choose if you want to see the number of instances behind the class names.
Press OK to apply your selections.