投影仪演示文稿中细小、间距紧密、未编号的脚注（可能带有列）

Question

由于我无法控制的原因，我需要将细小、间距紧密且未编号的脚注放入投影仪框架中。框架可能包含列，在这种情况下，脚注应位于框架底部，而不是列底部。

我尝试了多种方法来实现这一点（请参阅 MWE），但都没有成功：1）脚注编号仍然存在；2）脚注之间的间距太大；3）脚注有时仍会出现在列内。

如何在投影仪框架（可能有列）的底部制作微小的、间距紧密的、未编号的脚注？

如果所有这些对于 beamer 的脚注命令来说要求太高，那么任何不使用 beamer 的内部脚注命令而是使用其他方法来生成类似于脚注的内容以实现所需外观的建议也是受欢迎的。

梅威瑟：

\documentclass{beamer}

%make footnotes font tiny
\setbeamerfont{footnote}{size=\tiny}

% intended to hide footnote numbering - does not work: https://tex.stackexchange.com/a/30726/9789
\newcommand\blfootnote[1]{%
    \begingroup
    \renewcommand\thefootnote{}\footnote{#1}%
    \addtocounter{footnote}{-1}%
    \endgroup
} 

%intended to tighten footnote spacing - does not work: https://tex.stackexchange.com/a/118005/9789
\usepackage{setspace}
\setbeamertemplate{footnote}%
{%
    \parindent 1em\noindent%
    \raggedright\setstretch{1}%
    \hbox to 1.8em{\hfil\insertfootnotemark}\insertfootnotetext\par%
} 

\begin{document}

\frame{
    \begin{columns}
        \begin{column}{0.5\textwidth}
            \begin{itemize}
                \item some content\blfootnote[frame]{my unnumbered, tiny, tightly spaced footnote}
                \item some more content\blfootnote[frame]{second unnumbered, tiny, tightly spaced footnote}
            \end{itemize}
        \end{column}
        \begin{column}{0.5\textwidth}
            \begin{itemize}
                \item some more content\footnote[frame]{third tiny, tightly spaced footnote}
                \item some more content\footnote[frame]{fourth tiny, tightly spaced footnote}
            \end{itemize}
        \end{column}
    \end{columns}
}

\end{document}

Answer 1

重新利用https://tex.stackexchange.com/a/455981/36296我会做以下事情：

\documentclass{beamer}

\setbeamerfont{footnote}{size=\tiny}

\setbeamertemplate{footnote}{%
  \parindent 1em\noindent%
  \raggedright
  \linespread{0.5}
  \hbox to 1.8em{\hfil\insertfootnotemark}\insertfootnotetext\par\vspace*{-0.2em}%
}

\defbeamertemplate{footnote}{unnumbered}{%
  \parindent 1em\noindent%
  \raggedright
    \hbox to 1.8em{\hfil}\insertfootnotetext\par\vspace*{-0.2em}%
}

\begin{document}

\begin{frame}
    \begingroup
        \setbeamertemplate{footnote}[unnumbered]
        \footnotetext{my unnumbered, tiny, tightly spaced footnote tiny, tightly spaced footnote tiny, tightly spaced footnote tiny, tightly spaced footnote tiny, tightly spaced footnote tiny, tightly spaced footnotetiny, tightly spaced footnote tiny, tightly spaced footnote tiny, tightly spaced footnote}
      \footnotetext{second unnumbered, tiny, tightly spaced footnote}
    \endgroup

    \begin{columns}[onlytextwidth]
        \begin{column}{0.5\textwidth}
            \begin{itemize}
                \item some content
                \item some more content
            \end{itemize}
        \end{column}
        \begin{column}{0.5\textwidth}
            \begin{itemize}
                \item some more content\footnote[frame]{third tiny, tightly spaced footnote}
                \item some more content\footnote[frame]{fourth tiny, tightly spaced footnote}
            \end{itemize}
        \end{column}
    \end{columns}
\end{frame}

\end{document}