How to resize reference fonts in beamer when using apacite?

Question

The reference section in beamer spans too many slides in my case so I would like to reduce it's font size to bring it down to less than 7 slides.

This is start of the latex file:

\documentclass[11pt]{beamer}

\usefonttheme[onlymath]{serif}

\usepackage{beamerthemesplit}
\usepackage[T1]{fontenc} % Use 8-bit encoding that has 256 glyphs
\usepackage{apacite}
\usepackage[english]{babel} % English language/hyphenation (avoids badboxes)
\usepackage{amsmath,amsfonts,amsthm} % Math packages
\usepackage{graphicx,color}
\usepackage{algorithm, algorithmic}
\usepackage{booktabs}
\usepackage{gensymb} % \degree symbol

This is the reference section:

\section{References}
\subsection{Bibliography}
\begin{frame}[allowframebreaks]{References}
\bibliographystyle{apacite}
\bibliography{GaitAnalysis}
\end{frame}

There are quite a few posts related to this in TeX.SE, so I'll list out what I tried.

1. Using the shrink option (as done here) as shrink=90 along with allowframebreaks makes the reference section become mysteriously invisible.

2. Using \renewcommand*{\bibfont}{\scriptsize} as shown in here requires the use of biblatex. So I tried adding \usepackage[style=apa]{biblatex} to the list of packages. However, it clashed with the apacite package and removing which prevents me from using the \shortcite command.

3. I also tried adding these lines (as prescribed here) \setbeamerfont{bibliography item}{size=\footnotesize} \setbeamerfont{bibliography entry author}{size=\footnotesize} \setbeamerfont{bibliography entry title}{size=\footnotesize} \setbeamerfont{bibliography entry location}{size=\footnotesize} \setbeamerfont{bibliography entry note}{size=\footnotesize} But there was no change to the reference font at all.

4. This is what I used to do when using IEEEtran reference style (ref) {\footnotesize \bibliography{bibfile}} which used to work so well, but it has no effect when using apacite; I don't know what is preventing it from working now.

5. As I cannot use natbib (due to the conflict with apacite) I cannot use this solution either: \def\bibfont{\footnotesize}

What can I do to make this work?

Answer 1

As you did not provide compilable code, I took the example from https://tex.stackexchange.com/a/366791/36296

\documentclass{beamer}
\begin{filecontents}{\jobname.bib}
@article{TestCite2000,
    Author = {Smith, R. and Jones, O. and Doe, J and Yang, X. and Silva, E.},
    Journal = {A Great Predatory Journal},
    Title = {A title},
    Volume = {3},
    Year = {2000}}
\end{filecontents}
\usepackage[]{apacite}
\begin{document}
\begin{frame}
\frametitle{A citation}
\shortcite{TestCite2000}
\end{frame}
\begin{frame}
\frametitle{References}
\bibliographystyle{apacite}
\renewcommand{\bibliographytypesize}{\tiny}
\bibliography{\jobname}
\end{frame}
\end{document}