I've been gravitating to a presentation system where I author presentations in markdown, and then convert them to an HTML-based system that results in examples like this: http://www.users.muohio.edu/darcusb/s6test/test.html This allows me to focus on content, but very quickly create high-quality slides. So I have a kind of default representation of a slide, but I also have a couple of CSS classes that I attach (via XSLT) to individual slides depending on the content. For example, if I have a title without any other text content, then I attach a "title" class to the slide, which renders the title larger, and vertical-centered on the page. If there's a single image, I attach a "imgbig" class, which floats the image to the background, and enlarges it to fill the slide. I would like to be able to do the same with PDF using ConTeXt, ideally using simple-slides. I know some styles have similar parameter options for things like image placement, but I'm not seeing anything equivalent for titles. Is this possible to add? Bruce