You can also create overlays using prosper.  Overlays can be used to animate pdf presentations and to display information incrementally on normal transparencies.  To create an overlay, imbed a slide into the \overlays macro like this:

\overlays{n}{
\begin{slide}{...}
...
\end{slide}}

Where the first argument {n} is the number of steps involved in the animation. Some macros that you can use to control the material presented in each slide of an overlay are:

• \fromSlide{p}{mat}  Puts mat on every slide from p to n.
• \untilSlide{p}{mat}  Puts mat on every slide from slide 1 to p.
• \onlySlide{p}{mat}  Puts mat on slide p only.
• \FromSlide{p}  Puts all the material after the macro on every slide after p.
• \UntilSlide{p}  Puts all the material after the macro on every slide from 1 to p.
• \OnlySlide{p}  Puts all the material after the macro only on slide p.

If you plan on using the macros \fromSlide, \untilSlide, or \onlySlide, to replace material between slides you must add an asterisk before the first argument and a percent sign after the last argument.  For example:

\onlySlide*{1}{\includegraphics{example-1.eps}}%
\onlySlide*{2}{\includegraphics{example-2.eps}}%
\onlySlide*{3}{\includegraphics{example-3.eps}}%

This code would put example-1.eps on the first slide, would then replace it with example-2.eps on the second slide, and then replace it again with example-3.eps on the third slide.  Note that the percent signs at the end of each line prevent LaTeX from inserting spaces - due to carriage returns - that would cause a slight displacement between the graphics of your slides

If you want the material that gets put on a slide to depend on the mode (pdf or ps) you can use these macros:

• \PDForPS{ifPDF}{ifPS} Interprets material ifPDF if the chosen mode is pdf and ifPS if the mode is ps.
• \onlyInPDF{mat} Interprets materials mat only if the chosen mode is pdf.
• \onlyInPS{mat} Interprets materials mat only if the chosen mode is ps.

To summarize, one possible sample of code for an overlay could be:

\overlays{3}{%
\begin{slide}{Example}
\onlySlide*{1}{\includegraphics{example-1.eps}}%
\onlySlide*{2}{\includegraphics{example-2.eps}}%
\onlySlide*{3}{\includegraphics{example-3.eps}}%
\onlyInPS{\includegraphics{example.eps}}%
\end{slide}

In pdf format this slide will be displayed in three steps with three different figures.  In ps format there will be only one slide with the figure example.eps.