XpsSaveOptions.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/)....whether the document should be saved using a booklet printing layout...FixedPageSaveOptions.page_set is ignored when saving. This behavior matches MS Word...