HtmlSaveOptions.navigation_map_level property. Specifies the maximum level of headings populated to the navigation map when exporting to EPUB, MOBI, or AZW3 formats... save ( file_name = ARTIFACTS_DIR + 'HtmlSaveOptions.CreateAZW3Toc...doc . save ( file_name = ARTIFACTS_DIR + 'HtmlSaveOptions.CreateMobiToc...