PageMode

public PdfPageMode PageMode { get; set; }

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Writeln("Hello world!");

// Create a "PdfSaveOptions" object that we can pass to the document's "Save" method
// to modify how that method converts the document to .PDF.
PdfSaveOptions options = new PdfSaveOptions();

// Set the "PageMode" property to "PdfPageMode.FullScreen" to get the PDF reader to open the saved
// document in full-screen mode, which takes over the monitor's display and has no controls visible.
// Set the "PageMode" property to "PdfPageMode.UseThumbs" to get the PDF reader to display a separate panel
// with a thumbnail for each page in the document.
// Set the "PageMode" property to "PdfPageMode.UseOC" to get the PDF reader to display a separate panel
// that allows us to work with any layers present in the document.
// Set the "PageMode" property to "PdfPageMode.UseOutlines" to get the PDF reader
// also to display the outline, if possible.
// Set the "PageMode" property to "PdfPageMode.UseNone" to get the PDF reader to display just the document itself.
// Set the "PageMode" property to "PdfPageMode.UseAttachments" to make visible attachments panel.
options.PageMode = pageMode;

doc.Save(ArtifactsDir + "PdfSaveOptions.PageMode.pdf", options);

Document doc = new Document(MyDir + "Bookmarks in headers and footers.docx");

// Create a "PdfSaveOptions" object that we can pass to the document's "Save" method
// to modify how that method converts the document to .PDF.
PdfSaveOptions saveOptions = new PdfSaveOptions();

// Set the "PageMode" property to "PdfPageMode.UseOutlines" to display the outline navigation pane in the output PDF.
saveOptions.PageMode = PdfPageMode.UseOutlines;

// Set the "DefaultBookmarksOutlineLevel" property to "1" to display all
// bookmarks at the first level of the outline in the output PDF.
saveOptions.OutlineOptions.DefaultBookmarksOutlineLevel = 1;

// Set the "HeaderFooterBookmarksExportMode" property to "HeaderFooterBookmarksExportMode.None" to
// not export any bookmarks that are inside headers/footers.
// Set the "HeaderFooterBookmarksExportMode" property to "HeaderFooterBookmarksExportMode.First" to
// only export bookmarks in the first section's header/footers.
// Set the "HeaderFooterBookmarksExportMode" property to "HeaderFooterBookmarksExportMode.All" to
// export bookmarks that are in all headers/footers.
saveOptions.HeaderFooterBookmarksExportMode = headerFooterBookmarksExportMode;

doc.Save(ArtifactsDir + "PdfSaveOptions.HeaderFooterBookmarksExportMode.pdf", saveOptions);