如何为应采用单栏格式的双栏文章添加附录？

Question

我想在两栏文章的末尾添加附录，但附录应采用单栏格式，放在新页面上，并按字母顺序排列页码。这是我的文档类：

% Thesis report
%  
\documentclass[twocolumn,showpacs,%
  nofootinbib,aps,superscriptaddress,%
  eqsecnum,prd,notitlepage,showkeys,10pt]{revtex4-2}

\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{dcolumn}
\usepackage{hyperref}

\usepackage{lipsum} % generate random text, remove later...

% page number add middle bottom
\usepackage{fancyhdr} 
\fancyhf{}
\cfoot{\thepage}
\pagestyle{fancy}

% Add my name add top left corner
\lhead{author} % controls the left corner of the header
\rhead{ University }
\renewcommand{\headrulewidth}{0pt}

% To get keywords in abstract
\providecommand{\keywords}[1]{\textbf{\textit{Index terms---}} #1}

\begin{document}

\title{title}
\author{author  }
\affiliation{University}
\date{date}

\begin{abstract}
Your abstract.
\end{abstract}
% Add keywords to abstract
\keywords{one, two, three}
\maketitle
\section{Introduction}
\lipsum[2-4]
\section{Data}
\section{Methods}
\lipsum[2-4]
\section{Results}
\lipsum[2-4]
\section{Conclusion\_and\_Discussion}
\begin{acknowledgments}
We thank\dots
\end{acknowledgments}
%\begin{thebibliography}{9}
%\bibliographystyle{apalike}
%\bibliography{myrefs}
%\end{thebibliography}

\section{Appendix} % Appendix needs to be on a new full page (not two column but one column) with alphabetic page numbers.

\end{document}

Answer 1

改编

在附录部分之前插入以下内容：

\clearpage
\onecolumngrid
\appendix
\pagenumbering{alph}

结果

代码

% Thesis report
%  
\documentclass[twocolumn,showpacs,%
  nofootinbib,aps,superscriptaddress,%
  eqsecnum,prd,notitlepage,showkeys,10pt]{revtex4-2}

\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{dcolumn}
\usepackage{hyperref}

\usepackage{lipsum} % generate random text, remove later...

% page number add middle bottom
\usepackage{fancyhdr} 
\fancyhf{}
\cfoot{\thepage}
\pagestyle{fancy}

% Add my name add top left corner
\lhead{author} % controls the left corner of the header
\rhead{ University }
\renewcommand{\headrulewidth}{0pt}

% To get keywords in abstract
\providecommand{\keywords}[1]{\textbf{\textit{Index terms---}} #1}

\begin{document}

\title{title}
\author{author  }
\affiliation{University}
\date{date}

\begin{abstract}
Your abstract.
\end{abstract}
% Add keywords to abstract
\keywords{one, two, three}
\maketitle
\section{Introduction}
\lipsum[2-4]
\section{Data}
\section{Methods}
\lipsum[2-4]
\section{Results}
\lipsum[2-4]
\section{Conclusion\_and\_Discussion}
\begin{acknowledgments}
We thank\dots
\end{acknowledgments}
%\begin{thebibliography}{9}
%\bibliographystyle{apalike}
%\bibliography{myrefs}
%\end{thebibliography}

\clearpage
\onecolumngrid
\appendix
\pagenumbering{alph}
\section{Appendix} % Appendix needs to be on a new full page (not two column but one column) with alphabetic page numbers.

\end{document}

Answer 2

我想\onecolumngrid答案就在这里。