[Tex/LaTex] the default font in latex beamer

beamerfonts

What is the default font in LaTeX beamer. I want to use it in an ooffice master layout.

Best Answer

Just compile a minimal document to PDF and check the fonts in the document properties in your PDF viewer.

\documentclass{beamer}

\begin{document}
  \begin{frame}
    Hello World 
  \end{frame}
\end{document}

My viewer tell me that it's Computer Modern (CM) sans serif at 10pt size.

Original Question

\usefonttheme{professionalfonts} prevents beamer from overwriting your fonts and is therefore needed to use specified font packages.

palatino is deprecated, however. l2tabuen recommends this replacement:

\usepackage{mathpazo}
\usepackage[scaled=.95]{helvet}% uncomment these if required
\usepackage{courier}

URW Palatino look-alike

An alternative would be to use TeX Gyre's Pagella, for example.

Second Question

Since this is a different question it should really be a different question. However, you could use the description environment rather than the definition environment here. definition always starts a new line for the main part of the definition. (The name of the term can go on the same line but the definition itself starts below.) While this could obviously be changed, it seems to me there are simpler options. For example:

\begin{description}
  \item[Definition] Definition goes here.
\end{description}

A definition of a different kind...

The Code

\documentclass[xcolor=x11names,compress]{beamer}

\usepackage{graphicx}
\usepackage{tikz}
% \usepackage{palatino}% is obsolete - see l2tabu (or l2tabuen) for details
\usepackage{mathpazo}
% \usepackage[scaled=.95]{helvet}% uncomment these if required
% \usepackage{courier}

\useinnertheme{default}
\usefonttheme{professionalfonts}
\usefonttheme{serif}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}{Example}
\begin{description}
  \item[Definition] Let $R\subseteq S\times T$ be a relation.\break
  The domain of R is defined as:\break
  $\operatorname{Dom} \left({\mathcal R}\right) := \left\{{s \in S: \exists t \in T: \left({s, t}\right) \in \mathcal R}\right\}$\break
  and can be denoted $\operatorname{Dom} \left({\mathcal R}\right)$.
\end{description}
\end{frame}

\end{document}

[Tex/LaTex] How to increase the default font size of all slides in Beamer

Edit: I am grateful to samcarter who pointed out that the information that I provided below is also available in the beamer user guide "18.2.1 Choosing a Font Size for Normal Text".

I was able to find that in the source code of the beamer.cls file, there are relevant lines:

\def\beamer@size{{size11.clo}}

\DeclareOptionBeamer{8pt}{\def\beamer@size{{size8.clo}}}
\DeclareOptionBeamer{9pt}{\def\beamer@size{{size9.clo}}}
\DeclareOptionBeamer{10pt}{\def\beamer@size{{size10.clo}}}
\DeclareOptionBeamer{11pt}{\def\beamer@size{{size11.clo}}}
\DeclareOptionBeamer{12pt}{\def\beamer@size{{size12.clo}}}
\DeclareOptionBeamer{14pt}{\def\beamer@size{{size14.clo}}}
\DeclareOptionBeamer{17pt}{\def\beamer@size{{size17.clo}}}
\DeclareOptionBeamer{20pt}{\def\beamer@size{{size20.clo}}}

These lines indicate that the default font size is 11pt, and that the options Xpt are available for X in {8, 9, 10, 11, 12, 14, 17, 20}. Furthermore smaller (same as 10pt) and bigger (same as 12pt) are available. All options besides 10pt, 11pt and 12pt require the extsize package to be installed.

MWE: 20pt

\documentclass[20pt]{beamer}

\begin{document}

\begin{frame}{}
This is 20pt.
\end{frame}

\end{document}

MWE: 8pt

\documentclass[8pt]{beamer}

\begin{document}

\begin{frame}{}
This is 8pt.
\end{frame}

\end{document}