The Modify Class... menu item allows you to change the
  following characteristics of one or more classes:

  o  The access to the class (readonly or
     noreadonly). You cannot change the contents
     of a class that has been set readonly
  o  The creation remark that is associated with
     the class
  o  The name of the class

  Use the following steps to display a class's attributes:

  1. Click on a class.
  2. Pull down the View menu.
  3. Pull down the Expand submenu.
  4. Choose the Attributes menu item.