A view controller for the accessory view that the panel can present.
The PDF panel passes an
NSPDFInfo object to the accessory view controller to display the various attributes associated with the PDF file. Unlike a print panel (that is, an
NSPrintPanel object), a PDF panel can have only one accessory view.
Managing the Contents of a PDF Panel
A set of configuration options that determine the accessory views the PDF panel should display.
The initial value for the user-editable filename shown in the name field of the PDF panel.