脚注环境（回忆录、文章或 amsart）

Question

有脚注环境吗？

Few cases are known%
\begin{footnote}
The first experiments date back to 1912, when\ldots

A second paragraph.  
\end{footnote}

语境

我有一个自定义环境mynote，手稿作者可以在其中留下注释（等等）；注释以不同的颜色排版在文档正文中。最近，一位合作者要求将这些注释移到脚注中。

理想情况下，我想将环境定义从

\newenvironment{mynote}{%
  \par\color{purple}}{%
  \par}

类似于

\newenvironment{mynote}{%
  \marginpar{\footnotemark}% marginal mark for the note
  \footnotetext\begingroup}{%
  \endgroup\par}

但这似乎是一种（非常）错误的用法\begingroup。

以下是当前设置的示例

\documentclass{memoir}
\usepackage{tikz}
\newenvironment{mynote}{%
  \par\noindent\color{purple}}{%
  \par}
\begin{document}

This experimental setup has evolved
greatly.

\begin{mynote}
The first experiments date back to 1912, when\ldots

A second paragraph.  
\end{mynote}
\end{document}

Answer 1

类似这样？用 捕捉环境内容\BODY并应用\footnotetext到此？

\documentclass{memoir}
\usepackage{xcolor}
\usepackage{environ}
\NewEnviron{mynote}{%
    \marginpar{\footnotemark}% marginal mark for the note
    \footnotetext{{\color{purple}\BODY}}}[\par]
\begin{document}

This experimental setup has evolved
greatly.

\begin{mynote}
The first experiments date back to 1912, when\dots

A second paragraph.  
\end{mynote}
\end{document}