beamercolorheader-footer
I have a presentation that uses the theme Dresden with color theme beaver. Everything works fine, except for the name of the institute in the footer of the slides, which appears white on a very light grey background, making it basically impossible to read.
Add
\setbeamertemplate{footline}%{miniframes theme}
{%
\begin{beamercolorbox}[colsep=1.5pt]{upper separation line foot}
\end{beamercolorbox}
\begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,%
leftskip=.3cm,rightskip=.3cm plus1fil]{author in head/foot}%
\leavevmode{\usebeamerfont{author in head/foot}\insertshortauthor}%
\hfill%
{\usebeamerfont{institute in head/foot}\usebeamercolor[fg]{institute in head/foot}\insertshortinstitute}%
\end{beamercolorbox}%
\begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,%
leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
{\usebeamerfont{title in head/foot}\insertshorttitle} \hfill \insertframenumber%
\end{beamercolorbox}%
\begin{beamercolorbox}[colsep=1.5pt]{lower separation line foot}
\end{beamercolorbox}
}
after \usetheme{Dresden}. This will add a framenumber like so:
It's simply another modification to the theme. Those themes can be found in the beamer directory in the texmf-tree. Function of the beamer specific macros is documented in the beamer documentation.
Complete Code:
\documentclass{beamer}
\usetheme{Dresden}
\title[title]{long title}
\institute[inst]{long inst}
\setbeamertemplate{footline}%{miniframes theme}
{%
\begin{beamercolorbox}[colsep=1.5pt]{upper separation line foot}
\end{beamercolorbox}
\begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,%
leftskip=.3cm,rightskip=.3cm plus1fil]{author in head/foot}%
\leavevmode{\usebeamerfont{author in head/foot}\insertshortauthor}%
\hfill%
{\usebeamerfont{institute in head/foot}\usebeamercolor[fg]{institute in head/foot}\insertshortinstitute}%
\end{beamercolorbox}%
\begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,%
leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
{\usebeamerfont{title in head/foot}\insertshorttitle} \hfill \insertframenumber%
\end{beamercolorbox}%
\begin{beamercolorbox}[colsep=1.5pt]{lower separation line foot}
\end{beamercolorbox}
}
\begin{document}
\frame{1}
\end{document}
In this case, I propose you a more sophisticated definition for the footline template:
\documentclass{beamer}
\usetheme{Frankfurt}
\newcommand\mytext{some text}
\makeatother
\setbeamertemplate{footline}
{%
\leavevmode%
\hbox{\begin{beamercolorbox}[wd=.5\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm]{author in head/foot}%
\mytext
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.5\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{author in head/foot}%
\usebeamerfont{author in head/foot}\insertshortauthor\hfill\insertpagenumber
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatletter
\author[JD]{John Doe}
\begin{document}
\begin{frame}
Test
\end{frame}
\end{document}
I used two beamercolorboxes (one for the additional text, the other one for the short author and page number) to give you the possibility to customize each one separately, but of course, you could only use one and distribute the information to suit your needs.
To change the color used for the beamerboxes, set a beamer color and then use it in the mandatory argument for beamercolorbox; for example:
\documentclass{beamer}
\usetheme{Frankfurt}
\setbeamercolor{footlinecolor}{bg=black!70,fg=white}
\newcommand\mytext{some text}
\makeatother
\setbeamertemplate{footline}
{%
\leavevmode%
\hbox{\begin{beamercolorbox}[wd=.5\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm]{footlinecolor}%
\mytext
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.5\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{footlinecolor}%
\usebeamerfont{author in head/foot}\insertshortauthor\hfill\insertpagenumber
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatletter
\author[JD]{John Doe}
\begin{document}
\begin{frame}
Test
\end{frame}
\end{document}
Best Answer
Add the following line to your preamble, replacing
your_colorby a relevant color nameThe original definition is:
With
beavertheme color defined as:That explains why the font color appears fast white....