How to remove footnote marker (number) in Beamer?

Question

Hi This is my minimal working environment:

\documentclass[compress]{beamer}
\usepackage[version=4]{mhchem}
\usepackage{graphicx}
\begin{document}
\section{Introduction}
\subsection{Germanium Catenates}
\begin{frame}[t]{\ce{Ge-F} Containing Compounds} \vspace{20pt}

\begin{itemize}

\item There are 134 compounds in total that contain \ce{Ge-F} bond.

\begin{figure}[ht]

\includegraphics[width=0.4\textwidth]{Figures/Images1.png}
\end{figure}


\end{itemize}
\footnotetext[1]{{\tiny A test footnote in the first column}}

\end{frame}

\end{document}

How can I remove that marker number?

It looks like this:

Also, when I used this solution it ended up like this:

Thanks in advance.

Answer 1

As an alternative to the great answer from @marmot, you could also use beamers own mechanism to change the appearance of the footnote.

To change the size of the text:

\setbeamerfont{footnote}{size=\tiny}

To get an unnumbered footnote:

\setbeamertemplate{footnote}{%
  \parindent 1em\noindent%
  \raggedright
  \insertfootnotetext\par%
}

Both of these settings can either be applied globally (like in the example below) or locally for only one footnote if used inside a group.

Please also note that you don't need any floating specifier for your figure environment in a class that does not have floats.

\documentclass[compress]{beamer}

\usepackage[version=4]{mhchem}

\setbeamerfont{footnote}{size=\tiny}

\setbeamertemplate{footnote}{%
  \parindent 1em\noindent%
  \raggedright
  \insertfootnotetext\par%
}

\begin{document}
\section{Introduction}
\subsection{Germanium Catenates}
\begin{frame}[t]{\ce{Ge-F} Containing Compounds} \vspace{20pt}

\begin{itemize}

\item There are 134 compounds in total that contain \ce{Ge-F} bond.

\begin{figure}
\includegraphics[width=0.4\textwidth]{example-image-duck}
\end{figure}


\end{itemize}

\footnotetext{A test footnote in the first column}

\end{frame}

\end{document}

Answer 2

Welcome to TeX.SE! All you need to do is to use the \blfootnote command from this nice answer. BTW, if you use the beamer class, there is no need to load the graphicx package. I also do not see where you are using the mhchem package, but I kept it to show that there is no conflict.

\documentclass[compress]{beamer}
\usepackage[version=4]{mhchem}
\newcommand\blfootnote[1]{%
  \begingroup
  \renewcommand\thefootnote{}\footnote{#1}%
  \addtocounter{footnote}{-1}%
  \endgroup
}

\begin{document}
\section{Introduction}
\subsection{Germanium Catenates}
\begin{frame}[t]{\ce{Ge-F} Containing Compounds} \vspace{20pt}

\begin{itemize}

\item There are 134 compounds in total that contain \ce{Ge-F} bond.

\begin{figure}[ht]

\includegraphics[width=0.4\textwidth]{example-image-duck}
\end{figure}


\end{itemize}
\blfootnote{\tiny A test footnote in the first column}

\end{frame}

\end{document}