or
bonanza
beamer
How to fix the line breaking problem in the citation footnote (without moving the footnote somewhere else)?

```
\documentclass{beamer}
\usepackage[sorting=none,backref=true,style=verbose,maxcitenames=2,maxbibnames=99,natbib=true]{biblatex}

\addbibresource{biblatex-examples.bib}

\begin{document}

\begin{frame} 
	\begin{columns}
    \begin{column}{0.5\textwidth}
        \centering
        \includegraphics[width=0.9\textwidth,height=0.8\textheight]{example-image}
    \end{column}%%
    \begin{column}{0.5\textwidth}
            \footfullcite{aksin} is used.
    \end{column}%
	\end{columns}
\end{frame}


\end{document} 
```

![Screenshot_20200324_193328.png](/image?hash=20c374189b553311bbb8cd0cb14d1b8ff1603abe2cb6e714e53166c712a497a8)
Top Answer
samcarter
Normally the width of the footnote block is hard coded to `0.85\paperwidth`. You can slightly change the definition to use the current `\textwidth`:


```
\documentclass{beamer}
\usepackage[sorting=none,backref=true,style=verbose,maxcitenames=2,maxbibnames=99,natbib=true]{biblatex}

\addbibresource{biblatex-examples.bib}

\makeatletter
\renewcommand<>\@mpfootnotetext[1]{%
  \global\setbox\@mpfootins\vbox{%
    \unvbox\@mpfootins
    \reset@font\footnotesize
    \hsize\textwidth
    \@parboxrestore
    \protected@edef\@currentlabel
         {\csname p@mpfootnote\endcsname\@thefnmark}%
    \color@begingroup
      \uncover#2{\@makefntext{%
        \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}}%
    \color@endgroup}}
\makeatother

\begin{document}

\begin{frame} 
  \footfullcite{aksin} is used.
\end{frame}


\begin{frame} 
	\begin{columns}[onlytextwidth]
    \begin{column}{0.5\textwidth}
        \centering
        \includegraphics[width=0.9\textwidth,height=0.8\textheight]{example-image-duck}
    \end{column}%%
    \begin{column}{0.5\textwidth}
      \footfullcite{aksin} is used.
    \end{column}%
	\end{columns}
\end{frame}

\end{document}


```


![Screen Shot 2020-03-24 at 19.54.18.png](/image?hash=0cff65ca0302ecf9ec6a1af995fd3122d5dbb20b867c23ccbd799de830cba707)
Beamer citation in column: overlong text

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