## HtmlSaveOptions.navigation_map_level property Specifies the maximum level of headings populated to the navigation map when exporting to EPUB, MOBI, or AZW3 formats. Default value is ``3``. ```py......save(file_name=ARTIFACTS_DIR + 'HtmlSaveOptions.CreateAZW3Toc...navigation_map_level = 5 doc.save(file_name=ARTIFACTS_DIR + 'HtmlSaveOptions.CreateMobiToc...