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Two weeks ago my research
group asked for a practical introduction to
Git for the following week and I
volunteered for this task. I usually use
Beamer to make my
presentations, but I always start by making a plan in a plain text file using
Then I generally use a few Emacs
macros to put the necessary LaTeX markup
\subsection, etc.) around the sections
titles, then I insert that in my beamer skeleton and start writing the
content of the slides.
But this time, I don't really know why, I started to fill in the slide contents in outline-mode. Naturally, I then wanted to generate my presentation directly from that. And as a normal Emacs user (if you allow me that oxymoron), I decided that I should be able to do my presentation directly from within Emacs. I googled a bit and found, as I expected, tools that generate LaTeX from org-mode files, but also an attempt to do exactly what I wanted on github. I tried it and even though it didn't work quite well and didn't have the features I wanted, it was a good starting point. So I started hacking it to make it do what I want.
Let me introduce you to outline-presentation-mode, which is a minor mode for making presentations with outline-mode files. Here is how it interprets outline's headings:
- Headings at level 1, 2, and 3 are slides.
- Headings at level greater than 3 are considered like titles inside the slides. For the rest of the article I consider them part of the text entry of headings at level 1, 2, and 3.
- Headings at level 1 are considered sections. Their slides show their text entry plus the level 2 and 3 sub-headings they might have.
- Headings at level 2 and 3 are considered normal slides, so only their text entry are shown.
To install outline-presentation-mode, you need to put
elisp file in your Emacs
load-path and load it. This can be
automatized by putting
(require 'outline-presentation) in your
.emacs file. You can of course M-x byte-compile-file this
To start a presentation, you simply turn on the minor mode using M-x outline-presentation-mode. The presentation starts with the slides that contained the caret.
I want to be able to edit slides even in presentation mode so I use unusual keybindings to avoid overriding existing ones. Here are available actions:
- A-M-n moves to the next slide;
- A-M-p moves to the previous slide;
- A-M-f moves to the next section slide (corresponding to an outline level 1 heading);
- A-M-b moves to the previous section slide;
- A-M-a moves to the first slide;
- A-M-t displays only the section titles (table of contents);
- A-M-y displays only the slide titles (table of contents);
- A-M-s displays the slide which contains the caret (use it in one of the two "table of contents" displays);
- A-M-r resumes to the slide from which you jumped to the table of contents (this can be used recursively);
- A-M-q quits the presentation mode and goes back to outline-mode.
While the outline-presentation minor mode in on, the position part of the modeline contains your position in the presentation (for instance "13/42" if you are currently displaying the 13th of 42 slides) in addition to the usual position information. If you are displaying the table of contents (using A-M-t or A-M-y described above), this is replaced by "ToC".
As an example, you can find here the introduction to git that I gave to my research group. I don't know if the slides alone are very useful though. During the presentation I also had a terminal opened where I instantly demonstrated everything I talk about in the slides.
You can tell Emacs to increase text size with
M-x text-scale-adjust which is bound to
C-x = by default. This is useful when using a videoprojector
to give your presentation. You can do that automatically by adding a hook
outline-presentation-mode-hook. Like in this snippet
from my init.el file:
;; outline-mode (add-to-list 'auto-mode-alist '("\\.outline\\'" . outline-mode)) (require 'outline-presentation) (add-hook 'outline-presentation-mode-hook (lambda () (text-scale-increase 3)))
You can use M-x center-line and M-x center-region for your title slides. Do not forget about M-x artist-mode either.