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Specifies how the document should be displayed when opened. NOTE! Names of enum items should match PDF specification see PDF1.7page140.
Automatic: 0;
Document outline visible if available.
FullScreen: 4;
Full-screen mode, with no menu bar, window controls, or any other window visible.
UseAttachments: 6;
(PDF 1.6) Attachments panel visible.
UseNone: 1;
Neither document outline nor thumbnail images visible.
UseOC: 5;
(PDF 1.5) Optional content group panel visible.
UseOutlines: 2;
Document outline visible.
UseThumbs: 3;
Thumbnail images visible.