Change enumerate and itemize Style in LaTeX beamer
Original style
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\documentclass{beamer}
\begin{document}
\begin{frame}
\begin{columns}
\column{0.5\textwidth}
\begin{enumerate}
\item Item one
\item Item two
\begin{enumerate}
\item Sub-item one
\item Sub-item two
\begin{enumerate}
\item Subsub-item one
\item Subsub-item two
\end{enumerate}
\end{enumerate}
\end{enumerate}
\column{0.5\textwidth}
\begin{itemize}
\item Item one
\item Item two
\begin{itemize}
\item Sub-tem one
\item Sub-item two
\begin{itemize}
\item Subsub-item one
\item Subsub-item two
\end{itemize}
\end{itemize}
\end{itemize}
\end{columns}
\end{frame}
\end{document}
Change font size
We could use control sequence \setbeamertemplate in preamble area to globally specify the text font size in itemize and enumerate environment [1]:
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\documentclass{beamer}
\setbeamertemplate{itemize/enumerate body begin}{\Large}
\setbeamertemplate{itemize/enumerate subbody begin}{\small}
\setbeamertemplate{itemize/enumerate subsubbody begin}{\tiny}
% ....
However, as can be seen, the text at the second level overlaps slightly as font size increases. We could correct this point by finishing the graph (inserting an empty line or adding \\) before the itemize or enumerate environment whose font size is switch to different value compared with the former one [1].
The complete code shows as follows:
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\documentclass{beamer}
\setbeamertemplate{itemize/enumerate body begin}{\Large}
\setbeamertemplate{itemize/enumerate subbody begin}{\small}
\setbeamertemplate{itemize/enumerate subsubbody begin}{\tiny}
\begin{document}
\begin{frame}
\begin{columns}
\column{0.5\textwidth}
\begin{enumerate}
\item Item one
\item Item two\\
\begin{enumerate}
\item Sub-item one
\item Sub-item two\\
\begin{enumerate}
\item Subsub-item one
\item Subsub-item two
\end{enumerate}
\end{enumerate}
\end{enumerate}
\column{0.5\textwidth}
\begin{itemize}
\item Item one
\item Item two
\begin{itemize}
\item Sub-tem one
\item Sub-item two
\begin{itemize}
\item Subsub-item one
\item Subsub-item two
\end{itemize}
\end{itemize}
\end{itemize}
\end{columns}
\end{frame}
\end{document}
In addition, there are a lot of styles that could be specified by \setbeamertemplate, and more detailed information could be found in BEAMER appearance cheat sheet [2]:
Align items top
At default case, like aforementioned examples, the content in the frame environment will be displayed in the slide center. If want to align items top (essentially, align columns in columns environment top), we could specify option [t] for frame environment [3]:
The effect shows as follows:
If it does not work, we could add some extra codes in preamble area [4]:
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\makeatletter
\define@key{beamerframe}{t}[true]{
\beamer@frametopskip=.2cm plus .5\paperheight\relax%
\beamer@framebottomskip=0pt plus 1fill\relax%
\beamer@frametopskipautobreak=\beamer@frametopskip\relax%
\beamer@framebottomskipautobreak=\beamer@framebottomskip\relax%
\def\beamer@initfirstlineunskip{}%
}
\makeatother
or organise the contents using minipage environment rather than columns [5].
Change unordered list mark style [6, 7]
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\documentclass{beamer}
\usepackage{pifont}
\setbeamertemplate{itemize/enumerate body begin}{\small}
\setbeamertemplate{itemize/enumerate subbody begin}{\small}
\begin{document}
\begin{frame}[t]{List style}
\begin{columns}[t]
\column{0.60\textwidth}
Change the marker appearance.
\begin{itemize}
\setbeamertemplate{itemize items}[circle]
\item circle
\setbeamertemplate{itemize items}[square]
\item square
\setbeamertemplate{itemize items}[ball]
\item ball
\item Symbol provided by pifont package
\begin{itemize}% Symbol provided by `pifont` package
\item[\ding{51}] Code 51
\item[\ding{56}] Code 56
\item[\ding{43}] Code 43
\item[\ding{118}] Code 118
\item[\ding{170}] Code 170
\item[\ding{112}] Code 112
\item[\ding{117}] Code 117
\item[\ding{220}] Code 220
\item[\ding{226}] Code 226
\item[\ding{227}] Code 227
\item[\ding{228}] Code 228
\end{itemize}
\end{itemize}
\column{0.40\textwidth}
Change numerals.
\begin{enumerate}[I]
\item Point A
\item Point B
\begin{enumerate}[i]
\item part 1
\item part 2
\end{enumerate}
\item Point C
\item Point D
\end{enumerate}
\end{columns}
\end{frame}
\end{document}
References
[1] https://stackoverflow.com/a/75483399/22763127.
[2] https://www.cpt.univ-mrs.fr/~masson/latex/Beamer-appearance-cheat-sheet.pdf.
[3] https://latex-beamer.com/faq/place-content-frame/.
[4] https://tex.stackexchange.com/a/22944/306224.
[5] https://tex.stackexchange.com/a/184689/306224.
[7] https://latex-beamer.com/tutorials/lists/.
[6] https://mirror-hk.koddos.net/CTAN/macros/latex/required/psnfss/psnfss2e.pdf.