The PDF files have a unique feature to hold the view preferences that enable us in controlling how the viewer application will display the PDF document. Therefore, the viewer preferences dictionary of a PDF document allows you to control the way the document shall be presented on the screen or in print.
Please note that we can control the display properties of the PDF viewers. It includes controlling the display of PDF document title, hiding or showing Menubar, hide/show Status bar, hide/display Window UI.