[Tex/LaTex] defining sidebar table of contents in beamer

beamerslideshowthemes

I am writing a default beamer style for my slide. I wanna to define a shading box in the left side of slides and inser the section titles vertically at it. but I don't know how is it possible!!! the sidebar can be similar to "Berkeley" theme sidebar but at a different color and right side
thanks all

the section title on the left side

Best Answer

\documentclass{beamer}

\usetheme[right]{Berkeley}
\setbeamercolor{sidebar}{bg=red}

\begin{document}


\section{text}
\begin{frame}
    abc
\end{frame} 

\end{document}

For themes which - unlike the image you show in your question - have a colour shaded background:

\documentclass{beamer}

\usetheme[right]{Marburg}

\setbeamertemplate{sidebar canvas right}[vertical shading][top=red,bottom=blue]

\begin{document}

\section{text}
\begin{frame}
    abc
\end{frame} 

\end{document}
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