Protesilaos (Prot) has a new, interesting package available: buffer-to-pdf. It does just what its name suggests. It takes the current Emacs buffer and exports it to PDF preserving things like theme, and font characteristics.
It’s easy to use. You simply call buffer-to-pdf and you get a PDF of your current buffer. You can specify the orientation—portrait, landscape, or current window—for the output but that’s the only choice you have to make.
The most complicated thing about the package is its pagination. If you have an Org file, each headline is a new page. The idea is to turn it the org file into a set of slides. Again, this all happens automatically.
For a simple text file, buffer-to-pdf paginates at screen borders. That seems like a natural thing to do and allows a certain amount of control over where the page breaks occur by adjusting the window size.
Finally, you can specify explicit page breaks by inserting a form feed (^L). Prot’s video doesn’t make clear how the form feeds interact with the window boundary heuristic but, as Prot says, the best way of thinking about buffer-to-pdf is as a screen capture that produces a PDF. It’s a perfect way to share an Emacs buffer with someone else.
If you’re interested in this package, take a look at Prot’s video at the above link. You can check out the package’s Git repository here.