This pane can be used to set many properties collectively on the class objects.

You can set a property to be inheritable or non-inheritable. Double-click AND alt key pressed together will toggle between the two states.

The first two properties are obvious: The height of the extrusion of objects in that class, and the level where the objects would appear. But you can specify notes for that object and the kind of object that it is – which uses the SFA classification system Read about that separately. To set the kind of right click for the menu

We have a separate page to understand the "has" property … and you also need to be clear about the isKindOf property; for which you need to understand the SFA Taxonomy