The HTML template takes HTML code without recognizing carriage returns the way other templates do. (Thus allowing for neatly displayed HTML code) Images are uploaded through the template but this template is most useful to convert existing HTML and uploading image file folders to the root or default folder. Use an slash to start the call either as /page_files/... for image folder on the root or /Frameworks/default/page_files/... for image folder under the default folder.