# Get rid of navigation symbols but remaining left right arrows

I were annoyed by the buttons since I got nothing by clicking on them. But the little arrows besides them can navigate for me. The problem is that the arrows always invisible in the footline's black bg. Does there any way to highlight the arrows while hide the button? Thanks.

\documentclass[17pt]{ctexbeamer}

\usetheme{Warsaw}
\usecolortheme{whale}
\makeatletter
\defbeamertemplate*{footline}{mytheme}
{%
\leavevmode%
\@tempdimb=2.4375ex%
\ifnum\beamer@subsectionmax<\beamer@sectionmax%
\multiply\@tempdimb by\beamer@sectionmax%
\else%
\multiply\@tempdimb by\beamer@subsectionmax%
\fi%
\ifdim\@tempdimb>0pt%
\vbox to.3\@tempdimb{%
\vfill ~\color{white!75!black}\insertinstitute%~$$\cdot$$~\inserttitle
\vfill%
}%
\end{beamercolorbox}%
\vbox to.3\@tempdimb{%
\vfill%
}%
\end{beamercolorbox}%
\fi%
}
\makeatother

\title{高等数学}\subtittle{无穷级数}\author{Author}
\institute[short]{long}\date{\today}

\begin{document}

\frame{\titlepage}

\end{document}


You can reduce the navigation symbols to only the slide navigation by setting another beamer template and change the color by changing navigation symbols dimmed.

\documentclass{beamer}

\defbeamertemplate*%
{reduced}%