It's a zipped OTH file, which is the LibreOffice HTML template format. IIRC it also makes use of styles, instead of resizing fonts and changing colors willy-nilly ;-)
It's worth a visit to the various tabs in File > Properties so you can properly attend to various behind-the-scenes stuff in the HTML export.
https://www.friendlyskies.net/file_download/22/Example-Libre...
It's a zipped OTH file, which is the LibreOffice HTML template format. IIRC it also makes use of styles, instead of resizing fonts and changing colors willy-nilly ;-)
It's worth a visit to the various tabs in File > Properties so you can properly attend to various behind-the-scenes stuff in the HTML export.