A short note on how-to set a pdf-viewer for LaTeX-generated documents in Emacs.

My favourite all-purpose, extensible and customizable editor is Emacs. Mastering Emacs takes months, even years, and there is always a lot to discover. For example, I've just seen how Emacs tried to byte-compile a simple ChangeLog text document. Of course Emacs did what I asked to do it according to the rules defined in my .emacs.el.
So...