[Tex/LaTex] Omit/delete second bar under the navigation bar in szeged theme

beamerheader-footer

The code below gives nice slides with a navigation bar on top that leads to the different sections (I have no subsections) in the presentation. However, below the navigation bar there is a second bar (grey) without any content that I would like to get rid off because it just takes up space. Does anyone know how to do that? Removing that bar would result in the "perfect" presentation for me.

\documentclass{beamer}

\usepackage[T1]{fontenc}
\usepackage{lmodern}
%\usepackage[latin1]{inputenc} 
\usepackage[ansinew]{inputenc} 
\usepackage[ngerman]{babel}
\usepackage[babel,german=quotes]{csquotes}
\usetheme{Szeged}
\usecolortheme{seagull}
\usepackage{graphicx}
\usepackage{color}
\usepackage{multirow}

\title[Short title]{\textsc{{Long title 1}}}   
\author{Aut Hor} 
\institute[Short Ins]{Ins}
\date{\today} 

%***********************************
\begin{document}
\frame{\titlepage} 
\frame{\frametitle{Outline}{\tableofcontents}}


\section{FIRST SECTION}
\frame{\frametitle{FIRST FRAME} 
\begin{itemize}
    \item item 1 
    \item item 2
\end{itemize}
}

\section{SECOND SECTION}
\frame{\frametitle{SECOND FRAME} 
\begin{itemize}
    \item item 4
    \item item 5
\end{itemize}
}

\end{document}

Best Answer

As lockstep explained, the Szeged theme does:

  1. applies compress option
  2. loads miniframes outer theme with theme options footline=instituteline and subsection=true
  3. sets a separation line color which is suppressed with \usecolortheme{Seagull}.

Knowing that you can just apply compress option and change options for miniframes with next preamble:

\documentclass[compress]{beamer}
...
\useoutertheme[subsection=false, footline=institutetitle]{miniframes}
\usecolortheme{Seagull}

Stefan Kottwitz provides a better solution: Szeged theme loads miniframes outer theme with subsection=true which clashes with a later call to \useoutertheme[subsection=false]{miniframes}. This clash is avoided if subsection=false option is set before loading themes:

\PassOptionsToPackage{subsection=false}{beamerouterthememiniframes}
\documentclass{beamer}
\usetheme{Szeged} % implicitely loads miniframes
\begin{document}
\section{A section}
\subsection{A subsection}
\frame{Hello} 
\end{document}
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