beamerfontsizelistings
I'm writing a presentation using LaTeX and beamer. In some slides I put an image and some code using the listings package and the lstlisting environment. I'd like to use a font size smaller than \tiny for the codes. How can I set that?
Thank you in advance for the answers.
itemize symbols have font size hardcoded in definition (look at beamerthemedefault.sty or beamerbaseauxtemplates.sty).
% Itemize items, circle
\defbeamertemplate{itemize item}{circle}{\small\raise0.5pt\hbox{\textbullet}}
\defbeamertemplate{itemize subitem}{circle}{\footnotesize\raise0.5pt\hbox{\textbullet}}
\defbeamertemplate{itemize subsubitem}{circle}{\footnotesize\raise0.5pt\hbox{\textbullet}}
Section 16.3 "Changing the Templates Used for Different Elements of a Presentation" form beamer manual explain how to change it. It seems that would be possible to define a template with an option for font size. I don't know how to do it but a fast solution could be redeclare itemize symbols with new hardcoded size, something like
\documentclass{beamer}
\begin{document}
\begin{frame}[t]{Frame title}
\begin{itemize}
\item First item
\item Second item
\end{itemize}
\bigskip
{\setbeamertemplate{itemize item}{\small\raise1.25pt\hbox{\donotcoloroutermaths$\blaktriangleright$}}
\begin{itemize}
\item Second first item
\item Second second item
\end{itemize}
}
\bigskip
\begin{itemize}
\item Third first item
\item Third second item
\end{itemize}
\end{frame}
\end{document}
EDIT: Changing balls for Madrid Theme.
Madrid Theme (beamerthemeMadrid.sty) uses \useinnertheme[shadow]{rounded} which declares \setbeamertemplate{items}[ball]. So we need to look for ball in beamerbaseauxtemplates.sty. To do it short, in this file some 'spheres' are defined and used. You can make your own definition,
\documentclass{beamer}
\usetheme{Madrid}
\makeatletter
\pgfdeclareradialshading[bg,parent.bg]{mysphere}{\pgfpoint{0.15cm}{0.15cm}}%
{color(0cm)=(bg!15);
color(0.15cm)=(bg!75);
color(0.3cm)=(bg!70!black);
color(0.301cm)=(parent.bg)}
\defbeamertemplate{itemize item}{myball}%
{\raise-0.2cm\beamer@usesphere{item projected}{mysphere}}
\makeatother
\begin{document}
\begin{frame}[t]{Frame title}
\begin{itemize}
\item First item
\begin{itemize}
\item first subitem
\item second subitem
\end{itemize}
\item Second item
\end{itemize}
\bigskip
{\setbeamertemplate{itemize item}[myball]
\begin{itemize}
\item Third first item
\item Third second item
\end{itemize}
}
\end{frame}
\end{document}
The result is
I think sphere sizes are related with font size because they are declared using ex units but I'm not able to change its size with just a fontsize declaration. May be somebody else can help us.
You can use \fontsize:
\fontsize{<font size>}{<value for \baselineskip>}\selectfont
For example,
\fontsize{6pt}{7.2}\selectfont
changes the font size to 6 points and the \baselineskip to 7.2 points. The latter being the gap between consecutive lines.
You can define a new command to apply the change:
\documentclass{beamer}
\usepackage{lipsum}
\newcommand\Fontvi{\fontsize{6}{7.2}\selectfont}
\begin{document}
\begin{frame}
\frametitle{Frame with reduced font size}
\Fontvi
\lipsum[1]
\end{frame}
\begin{frame}
\frametitle{Frame with regular font size}
\lipsum[1]
\end{frame}
\end{document}
Best Answer
You can define (for ease of use and re-use) a
\srcsizecommand that sets an arbitrary font size (here 5pt for example)and then in the style, you can use to set the size for the basic style:
(adapt for other font families)