# Beamer - How to customise the header of a frankfurt slide?

I use the following options:

\usetheme{Frankfurt}


and this yields a slide which looks like this:

Is it possible

• to bring 'Section 1' and 'Section 2' closer together?
• to draw a separation line before the frame title ?
-

Sure. You can redefine the headline template; I produced the separation line by using a beamercolorbox of .75ex height and using the upper separation line head color previously set.

Instead of using \insertnavigation, I used \insertsectionnavigationhorizontal which allows for more control. I used the red color, since you didn't provide complete information on the color schema used in your code snippet.Feel free to change the settings according to your needs:

\documentclass{beamer}
\usetheme{Frankfurt}

\setbeamercolor{frametitle}{fg=red, bg=white}

\makeatletter
{%
\ifbeamer@sb@subsection%
\vskip-9.75ex%
\else%
\vskip-7ex%
\fi%
\end{beamercolorbox}%
\ifbeamer@sb@subsection%
\begin{beamercolorbox}[ignorebg,ht=2.125ex,dp=1.125ex,%
\end{beamercolorbox}%
\fi%
\end{beamercolorbox}
}%
\makeatother

\begin{document}

\section{Section One}

\begin{frame}
\frametitle{Test Frame One}
test
\end{frame}

\section{Section Two}

\begin{frame}
\frametitle{Test Frame Two}
test
\end{frame}

\end{document}


As Claudio Fiandrino mentions in his comment, using

\insertsectionnavigationhorizontal{\paperwidth}{\hskip0pt plus1fill}{\hskip0pt plus1fill}


\insertsectionnavigationhorizontal{\paperwidth}{}{\hfill\hfill}


will produce centered sections in the navigation bar.

The previous approach has a disadvantage: the indicators for subsections are no longer included. To recover the indicators and to get the section titles closer, a redefinition of \insertnavigation will be needed:

\documentclass{beamer}
\usetheme{Frankfurt}

\setbeamercolor{frametitle}{fg=red!70!black, bg=white}

\makeatletter
\vbox{{%
\beamer@xpos=0\relax%
\beamer@ypos=1\relax%
\hbox to #1{\hskip.3cm\setbox\beamer@sectionbox=\hbox{\kern1sp}%
\ht\beamer@sectionbox=1.875ex%
\dp\beamer@sectionbox=0.75ex%
\hskip.3cm%
\global\beamer@section@min@dim\z@
\beamer@section@set@min@width
\box\beamer@sectionbox\hfill\hskip.3cm}%
}}}

{%
\ifbeamer@sb@subsection%
\vskip-9.75ex%
\else%
\vskip-7ex%
\fi%
\end{beamercolorbox}%
\ifbeamer@sb@subsection%
\begin{beamercolorbox}[ignorebg,ht=2.125ex,dp=1.125ex,%
\end{beamercolorbox}%
\fi%
\end{beamercolorbox}
}%
\makeatother

\begin{document}

\section{Section One}
\subsection{Test Subsection One One}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}
\subsection{Test Subsection One Two}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}

\section{Section Two}
\subsection{Test Subsection Two One}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}
\subsection{Test Subsection Two Two}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}

\section{Section Three}
\subsection{Test Subsection Three One}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}
\subsection{Test Subsection Three Two}
\begin{frame}
\frametitle{Test Frame}
test
\end{frame}

\end{document}


-
You were faster than me in answering. :) Why not using \insertsectionnavigationhorizontal{\paperwidth}{\hskip0pt plus1fill}{\hskip0pt plus1fill} to make the sections centered in the navigation bar? –  Claudio Fiandrino May 22 '12 at 19:34
@ClaudioFiandrino I initially thought so, but I am not sure about the OP's intent; I'll add your suggestion to my answer. –  Gonzalo Medina May 22 '12 at 19:38
Great! Is it normal that the navigation circles have disappeared? –  Marco May 22 '12 at 19:43
@Marco: yes, it's normal! This is the only drawback of this method. Do you want them anyway? –  Claudio Fiandrino May 22 '12 at 19:48
@Claudio Fiandrino: I would have liked them... is it difficult to make them reappeared? –  Marco May 22 '12 at 19:51

Also a little hackish (or pragmatic if you allow me to sell it :P) version is to reduce the length of the beamercolorbox that holds the navigational items. I actually copy pasted the headline definition from the smoothbars theme and added a 0.5 factor. You can adjust how much they should spread out depending on the size/number of sections. I just copied the line solution from Gonzalo's answer.

\documentclass{beamer}
\usetheme{Frankfurt}
\setbeamercolor{frametitle}{fg=red, bg=white}

\makeatletter
{%
\ifbeamer@sb@subsection%
\vskip-9.75ex%
\else%
\vskip-7ex%
\fi%
\end{beamercolorbox}%
\ifbeamer@sb@subsection%
\begin{beamercolorbox}[ignorebg,ht=2.125ex,dp=1.125ex,%
\end{beamercolorbox}%
\fi%
\end{beamercolorbox}

}%

\makeatother

\begin{document}
\section{Introduction}
\subsection{Subintro1}
\begin{frame}{Introduction}
Important Intro
\end{frame}
\subsection{Subintro2}
\begin{frame}{Dummy frame 1}{Subtitle} \end{frame}
\section{Main Course}
\subsection{Main}
\begin{frame}{Dummy frame 2} \end{frame}
\subsection{Course}
\begin{frame}{Dummy frame 3} \end{frame}
\section{Dessert}
\subsection{Wine}
\begin{frame}{Dummy frame 2} \end{frame}
\subsection{Coffee}
\begin{frame}{Dummy frame 3} \end{frame}
\end{document}


-
Looking at the section titles, it should be a "Yummy frame" ;-) –  Gonzalo Medina May 22 '12 at 21:25
@GonzaloMedina Argh, how did I miss that window of opportunity? :-) –  percusse May 22 '12 at 21:33
@percusse: +1, thanks! –  Marco May 23 '12 at 5:30