LaTeX/Beamer theme for IIASA presentations

This repository contains a LaTeX Beamer theme that mimics the appearance of the IIASA presentation templates for Microsoft PowerPoint.

Contributions and refinements from IIASA colleagues are welcome.

Features, usage, and demo

See the files demo.tex and demo-2019.tex, which demonstrate most of the features described below. On a system with GNU Make installed, run make to compile both of these demo files to PDF.
Select theme version. Use either the 2019 or 2024 version of the theme:
```
\documentclass[aspectratio=169]{beamer}
\usetheme[version=2024]{iiasa}
```
The 2024 version is default and will be selected if no option is given.
Install fonts. The 2019 version of the theme uses Tahoma (if available; proprietary) or Fira (free) fonts. The 2024 version uses Source Sans Pro, which is available in the TeXLive package of the same name.
The title frame, section frames, and a “Thank you!” frame (see below) are displayed with a coloured or image background and the IIASA logo. The files used for this purpose are in the image/ directory.
The IIASA colours are available, including e.g. IIASAblue. See beamercolourthemeiiasa_20*.sty. The colours are used to style text elements, including internal and external hyperlinks.

(2019 theme version only.) To handle long frame titles, use:

{
\pgfkeys{/iiasa/frametitle=long}
\begin{frame}
…
\end{frame}
}

Generate a “Thank you!” frame:
```
\makefinalslide
```
Use \appendix; frames after this one will be numbered but the total number of frames displayed will include only frames up to this point. For example, a bibliography may begin on frame “21/20”, where frame 20 is the last before \appendix.

The theme itself is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. This means that if you change the theme and re-distribute it, you must retain the copyright notice header and license it under the same CC-BY-SA license.

Presentations created with the theme will contain the IIASA logo, which is property of IIASA and may not be used without permission.