How to reduce margin size for one slide to fit a table in beamer?

Question

I want to reduce the margin size for one slide so I can put a wider table into it. I have this MWE:

\documentclass{beamer}
\usepackage{geometry}
\usepackage{tabularray}
\setbeamertemplate{frametitle}[default][center]
\begin{document}


\begin{frame}{Title at the top}
\end{frame}


\newgeometry{left=0.7cm, right=0.7cm}%, top=1cm, bottom=1cm} % Adjust margins for the next frame
\begin{frame}{Title much lower down}
\begin{table}
\begin{tblr}{
  hlines,
  colspec={XXX},
  row{1}={font=\bfseries,halign=c},
  row{2-Z}={font=\small}
}
\large Day 1 & \large Day 2 & \large Day 3 \\ 

\end{tblr}
\end{table}
\end{frame}
\end{document}

This works well except that the title of the second slide is not at its usual position. It is much lower down the page.

How can it be moved back to its usual position?

Answer 1

Another way is to use changepage package and extend \textwidth just for table (as suggested @David in his comment):

\documentclass{beamer}
\usepackage{tabularray}
\setbeamertemplate{frametitle}[default][center]
\usepackage{changepage}

\begin{document}

\begin{frame}
\frametitle{Title much lower down}
\begin{adjustwidth}{-1em}{-1em}
\begin{tblr}{hlines,
  colspec={XXX},
  row{1}={font=\large\bfseries, c},
  row{2-Z}={font=\small}
}
Day 1   &   Day 2   &   Day 3   \\ 
\end{tblr}
\end{adjustwidth}

\rule{\textwidth}{3pt}
\end{frame}
\end{document}

Answer 2

You can use columns to temporarily change the margins:

\documentclass{beamer}
\usepackage{tabularray}
\setbeamertemplate{frametitle}[default][center]
\begin{document}

\begin{frame}
\frametitle{Title much lower down}
\begin{columns}
\begin{column}{.95\paperwidth}
\begin{tblr}{
  hlines,
  colspec={XXX},
  row{1}={font=\bfseries,halign=c},
  row{2-Z}={font=\small}
}
\large Day 1 & \large Day 2 & \large Day 3 \\ 
\end{tblr}
\end{column}
\end{columns}
\end{frame}
\end{document}