To find a class in the Class Relationship pane:
Comparison is case-insensitive and position-independent. For example, in the Newspaper project, ad would find Advertisement, Personals_Ad, and Standard_Ad.
If a found class is not currently visible in the Class Relationship pane, Protégé-2000 automatically scrolls to the correct location and expands the hierarchy to make the class visible.
If you are unable to find the class you are looking for, the class may be
hidden. To verify that hidden classes are displayed, choose Configure
from the Project menu, go to the Display tab, and make sure the Display
Hidden Classes option is checked. When Display Hidden Classes is
checked, hidden classes are shown with an
icon.
Next: Replacing a Superclass