PdfSaveOptions.use_book_fold_printing_settings property. Gets or sets a boolean value indicating whether the document should be saved using a booklet printing layout, if it is specified via [PageSetup.multiple_pages](../../../aspose.words/pagesetup/multiple_pages/)....how to save a document to the PDF format in the form of a book...method converts the document to .PDF. options = aw . saving . PdfSaveOptions...