Optionally, select a class from the Object is specific Class (optional) drop-down list. The class selected is the class that you wish to check the current object against. If the Object is specific class (optional) field is left blank, the rule will check the object's class against any class in the specified application. It may also be left blank if you are checking against a class name saved to a named property. If you want to clear the Object is specific class (optional) selection, click Clear.