如果我使用該fnpara包作為段落腳註：
\documentclass{article}
\usepackage{multicol}
\usepackage{lipsum}
\usepackage{fnpara}
\begin{document}
\begin{multicols}{2}
\lipsum[1]
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\footnote{This is a test.}\footnote{This is a test.}\footnote{This is a test.}
\lipsum[1-10]
\end{multicols}
\end{document}
然後腳註與頁腳重疊。footmisc包也遇到同樣的問題。然而，這不會發生在manyfoot包中
\documentclass{article}
\usepackage{multicol}
\usepackage{lipsum}
\usepackage[para]{manyfoot}
\DeclareNewFootnote[para]{A}
\begin{document}
\begin{multicols}{2}
\lipsum[1]
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\footnoteA{This is a test.}\footnoteA{This is a test.}\footnoteA{This is a test.}
\lipsum[1-10]
\end{multicols}
\end{document}
manyfoot包有什麼作用multicol，而fnpara沒有什麼作用？如何使用fnpara和軟體包解決這個問題footmisc？
答案1
fnpara 和 footmisc 使用相同的演算法（或多或少），最初來自 TeXbook 中 Don Knuth 的範例。在某些時候，它們將頁面上收集的所有腳註組合起來，並將它們拆箱成一個段落（執行此操作的命令稱為\makefootnoteparagraph） 該段落的寬度在巨集中明確設置為
\hsize=\columnwidth
這在 LaTeX 中通常是正確的，因為在兩列模式下，您希望這樣的段落是列的寬度。然而，在多列中，期望腳註跨越所有列，因此在這種情況下，段落應設定為\textwidth。
因此，一個可能的解決方法是修補該命令以\textwidth代替使用，即
\usepackage{etoolbox}
\patchcmd{\makefootnoteparagraph}
{\columnwidth}{\textwidth}
{\typeout{Success}}{\typeout{patch failed}}
適用於 fnpara 和 footmisc。
但請注意，這不是一個通用補丁，即，如果您不使用 multicol，而是使用類別的\twocolumn或twocolumn 選項，那將是錯誤的！
PS 沒有檢查它是如何在 Manyfoot 中完成的。該套件進行了更複雜的操作，並且可能使用不同的演算法來獲取段落腳註，因此不會遇到問題。