[Tex/LaTex] Why can’t I load miniframes outer theme after Szeged theme

beamermini-framesoption-clash

Making some tests to answer omit delete second bar under the navigation bar in szeged theme I found that

\documentclass{beamer}

\usetheme{Szeged}
\useoutertheme[subsection=false]{miniframes}

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

finishes with
! LaTeX Error: Option clash for package beamerouterthememiniframes. and I would like to understand why is it.

Szeged already load miniframes with another option but I thought that was always possible to load other themes in order to combine them.

Best Answer

You could pass the option explicitely to the package, which you could do even before \documentclass. Note, we use the full theme package name here:

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

Szeged loads miniframes just with a footline option:

\useoutertheme[footline=institutetitle]{miniframes}

This way, miniframes will work also with your option and will not show the subsection line in the header.

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