If you want to create overhead presentations (á la Powerpoint) with LaTeX, you can do so by using Beamer class, which creates surprisingly professional and sophisticated documents that you can then display using any pdf viewer (e.g., such as Adobe Acrobat). The advantage of using LaTeX over a program like Powerpoint is that it doesn't require expensive software for either creating or displaying your presentation; it thus makes the presentation truly "portable". And, if you already have the basics of LaTeX down, learning the basics of creating a beamer presentation does not take much effort.
getting beamer class
You can download beamer class by either downloading the package from
its webpage, or better yet, if you have Ubuntu (or Debian), just
apt-get latex-beamer (which will also install it for you as well).
If you download the beamer package from the website, installation will be a bit more complicated. Follow the instructions included in the package. (Or look elsewhere for instructions on how to install LaTeX classes. It's really as easy as putting a few files in places where LaTeX knows where to look: the trick is figuring out where LaTeX looks for them. I may put up a tutorial on hand-installing LaTeX classes in the future.)
the basic document structure
Beamer class is quite feature-rich, and it's 200+ page manual may be a little intimidating. However, creating a basic presentation really requires doing only two things:
- Declaring beamer class in your LaTeX preamble, and
- Enclosing each "slide" in a special "frame" environment.
You will probably also want to include the date, title, author, etc., of your presentation. These can all be included in a separate title slide, created with the
\titlepagecommand. You may also want to include titles for your frames (which are displayed in large font at the top of the slide) with the
\frametitle command. Thus, a basic beamer document will look something like the following:
\documentclass{beamer}
\title{Here is my Title}
\author{Christina Huggins}
\date{July 15th, 2005}
\begin{document}
\begin{frame}
\frametitle{Optional Title for My Slide}
Here is one slide.
\end{frame}
\begin{frame}
Here is another slide.
\end{frame}
\end{document}
Note that beamer class is meant to be compiled using pdflatex to easily create a pdf presentation.
Knowing this basic document structure, you can create quite a decent presentation. At this point, I only use these presentations for my teaching lectures, and I have not the need for anything terribly fancy. However, I've found a few of the additional features to be quite useful, so I've included them below.
themes
While the default presentation looks quite clean and professional, you may want to play with the style of your presentation with themes. Beamer comes prepackaged with quite a few complete themes, (as well as what I call "sub-themes": color themes, or themes that only apply to the "outer" or "inner" part of the slide frames). The manual explains the differing themes in a bit of detail, and you can explore these different themes on your own. Once you find a theme you like (I like Boadilla), you can just declare it in the preamble like so:
\usetheme{ThemeName}.
columns & blocks
There are two handy environments for structuring your slide: "blocks", which divide your slide (horizontally) into headed sections, and "columns" which divides your slide (vertically) into columns.
columns
example
\begin{frame}
\begin{columns}[c] % the "c" option specifies center vertical alignment
\column{.5\textwidth} % column designated by a command
Contents of the first column
\column{.5\textwidth}
Contents split \\ into two lines
\end{columns}
\end{frame}
\begin{frame}
\begin{columns}[t] % contents are top vertically aligned
\begin{column}[5cm] % each column can also be its own environment
Contents of first column \\ split into two lines
\end{column}
\begin{column}[T]{5cm} % alternative top-align that's better for graphics
\includegraphics[height=3cm]{graphic.png}
\end{column}
\end{columns}
\end{frame}
See resulting
pdf.
blocks
example\begin{frame}
\begin{block}{Block Heading}
Enlosing text in the ``block'' environment creates a distinct, headed block of text.
\end{block}
\begin{block}{Second Block Heading}
This lets you visually distinguish parts of your slide easily.
\end{block}
\end{frame}
See resulting
pdf.
revealing things incrementally
There may be times during your presentation when you want to reveal things on a slide piecemeal (e.g., you reveal a list one item at a time).
The most straightfoward way to do this is via the "pause" command. If you want more sophisticated reveals (e.g., you want the first and last item on a list to be revealed at the same time), then you would use other methods. But, "pause" works perfectly for my purposes.
example
\begin{frame}
Since I may want to focus on one item at a time in my presentation,
\begin{itemize}
\item I want to reveal only the first item on my list initially,
\pause
\item then the second item,
\pause
\item then the third,
\pause
\item and so on...
\end{itemize}
\end{frame}
See resulting
pdf.
making accompanying documents
There are several ways to create notes, handouts, or other accompanying documents for your presentation. My preferred way of doing this (since I like to include a lot of extra commentary and notes for reference later) is to use article mode. That is, I can create an article, load the package "beamerarticle", and LaTeX will render all of the beamer commands and environments within article mode.
Anything within the frames will be printed in the article; anything outside the frames will also be printed in the article (but you can specify that this text be ignored in beamer mode). So, in short, you can create your beamer presentation and and an accompanying document that includes both the beamer text and extra notes.
The most efficient way to do this is the following:
- Create your main .tex file (including both the text for your presentation and the notes in between). Leave off the document class declaration (let's call it name.tex).
- Create another file, name.beamer.tex, the content of which is the following:
\documentclass[ignorenonframetext]{beamer}
\input{name.tex}
- Create a third file, name.article.tex, the content of which is the following:
\documentclass{article}
\usepackage{beamerarticle}
\input{name.tex}
Then, run
pdflatex on both name.beamer.tex and name.article.tex to get your presentation and accompanying document, respectively. To demonstrate an extended example of this, I included below both the main .tex file, and the resulting beamer presentation and article that I rendered from it (I'm not including the beamer.tex and article.tex files, since they really are just as simple as the examples above).
example- Main .tex file
- Beamer pdf
- Article pdf
Tomado de:
When doing slides for a talk you sometimes want to first give an overview of a certain idea and then explain some parts of it in more detail. One way of doing this is to uncover the information bitwise. Sometimes this might not be ideal for a couple of reasons. For example, you must be careful to leave enough space for the extra information, which can easily lead to an odd looking layout. Alternatively, and in particular if you have quite a lot of extra information, you could create an entirely new page covering the extra information and then come back to the overview page once you have finished explaining them. This approach also has certain downsides, the most important of which probably is that the audience might miss the fact that you are still talking about the same thing. Especially if you want to provide details concerning several different aspects of you main idea this can be very confusing.
