Displays a dialog showing information about the application.
Displays a preferences dialog for the application.
Exits the application after letting the user review all unsaved views.
Handles an open application request from Mac OS X (this action does nothing).
Opens a file for which an open-request was sent to the application.
Prints a file for which a print request was sent to the application.
If all views are iconified, de-iconifies a view and brings it to the front.