## HtmlSaveOptions::get_NavigationMapLevel method Specifies the maximum level of headings populated to the navigation map when exporting to EPUB, MOBI, or AZW3 formats. Default value is **%3**. ```...... ```cpp auto doc = System::MakeObject<Aspose:...options->set_NavigationMapLevel(2); doc->Save(get_ArtifactsDir() + u"HtmlSaveOptions...