{mini-frames} are small navigational symbols, with each symbol representing one frame. They are used by the presentation class {beamer}.

Mini frames are small navigational symbols, with each symbol representing one frame. They are used by the presentation class , e.g. in the outer themes miniframes and smoothbars.

Example of a headline with mini frames:

headline of the beamer theme "Ilmenau", displaying some mini frames

\documentclass{beamer}
\usetheme{Ilmenau}
\begin{document}
\section{Section 1}
\subsection{Subsection 1}
\frame{}\frame{}\frame{}
\subsection{Subsection 2}
\frame{}\frame{}
\section{Section 2}
\subsection{Subsection 1}
\frame{}\frame{}\frame{}\frame{}
\section{Section 2}
\subsection{Subsection 1}
\frame{}\frame{}
\subsection{Subsection 2}
\frame{}\frame{}\frame{}
\subsection{Subsection 3}
\frame{}\frame{}\frame{}\frame{}
\end{document}

Note that a section must contain at least one subsection so that the mini frames are shown.

By default, each subsection starts a new line of mini frames, as can be seen in the above example. By adding the document class option compress, only a single line is used:

headline of the beamer theme "Ilmenau" in combination with the "compress" option

The code to produce this output is the same as above, only the first line was changed to \documentclass[compress]{beamer}.

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