Greetings. I am writing teaching material (for programming) using Org. All the material (text, figures, code, program outputs) are written using Org and Babel-supported languages. Publishing to html works just fine. What I would like to do, however, is to add some layout structure to the produced html.
More specifically, I would like to add, on all pages, a navigation bar on the left-hand side and a title bar with no functionality on the top of each page. What options do I have to accomplish this? Searches led me to "derived backends," but they sound like an overkill for a task that is this simple. Or? Jarmo