## Document::UpdateThumbnail() method Updates [Thumbnail](../../..aspose.words.properties/builtindocumentprope/get_thumbnail/) of the document using default options. ```cpp void Aspose::Words::Docu......options->set_ThumbnailSize(System::Drawing::Size(400, 400)); options-...options->set_ThumbnailSize(System::Drawing::Size(400, 400)); options-...