# A.2 Inserting equations in Powerpoint presentations

The two tools most commonly used for presenting talks – Microsoft *Powerpoint* and OpenOffice *Impress* – have limited facilities for importing text rendered in latex into slides. *Powerpoint* does include its own *Equation Editor*, but its output is considerably less professional than that produced by latex. This can prove a frustration for anyone who works in a field with notation which makes use of non-standard characters, but especially for those who work in mathematical and equation-centric disciplines.

It is possible to import graphic images into *Powerpoint*, but it cannot read images in PostScript format, the format in which latex usually produces its output. Pyxplot’s `gif` and `png` terminals provide a fix for this problem, as the following example demonstrates:

set term transparent noantialias gif
set term dpi 300
set output 'equation.gif'
set multiplot
# Render the Planck blackbody formula in LaTeX
set textcolour yellow
text '$B_\nu = \frac{8\pi h}{c^3} \
\frac{\nu^3}{\exp \left( h\nu / kT \right) -1 }$' at 0,0
text 'The Planck Blackbody Formula:' at 0 , 0.75

The result is a `gif` image of the desired equation, with yellow text on a transparent background. This can readily be imported into *Powerpoint* and re-scaled to the desired size.