我怎样才能扩大标题？

Question

我正在尝试将标题扩展到 之外\textwidth。我尝试使用\makebox，但是，结果导致错误：

\documentclass{article}
\usepackage[left=2.5cm,right=2.5cm,top=2.5cm,bottom=2cm]{geometry}
\usepackage[demo]{graphicx}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{blindtext}
\usepackage{titlesec}
\begin{document}


\begin{figure}
\centering
\renewcommand{\arraystretch}{3}
\begin{tabular*}{\textwidth}{@{}ccc@{}}
  \includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
        \includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
        \includegraphics[width=0.31\linewidth,height=2cm]{dummy}\\
    \includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
        \includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
        \includegraphics[width=0.31\linewidth,height=2cm]{dummy}
\end{tabular*}
\makebox[1.2\textwidth][c]{
\caption{\emph{Title.} \blindtext}
}
\label{fig:mipLevels}
\end{figure}

\blindtext

\end{document}

错误信息：

Missing \endgroup inserted.

Answer 1

使用caption包裹本地更改width：

\documentclass{article}
\usepackage{blindtext,caption,showframe}
\begin{document}

\begin{figure}
  \captionsetup{width=1.2\textwidth}
  \caption{\blindtext}
\end{figure}

\end{document}

水平调整使用changepage包裹的adjustwidth环境也是一种选择：

\documentclass{article}
\usepackage{changepage,blindtext,showframe}
\begin{document}

\begin{figure}
  % Add .1\textwidth on either side of the caption
  \begin{adjustwidth}{-.1\textwidth}{-.1\textwidth}
    \caption{\blindtext}
  \end{adjustwidth}
\end{figure}

\end{document}

Answer 2

正如 Werner 所说，caption 包对此有一些特定参数，或者与任何文本一样，您可以使用类似的环境，quote但边距为负数。如果您还需要使其他文本（而不仅仅是标题）更宽，这会很有用。

\documentclass{article}

\newenvironment{outdent}
               {\list{}{\leftmargin-2cm
                \rightmargin\leftmargin}%
                \item\relax}
               {\endlist}

\begin{document}

\begin{table}[h]

X\dotfill X

\caption{%
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
}

\begin{quote}
\caption{%
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
}
\end{quote}

\begin{outdent}
\caption{%
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
a a a a a a a a a a a a a a a  a a a a a a a
}
\end{outdent}


\end{table} 


\end{document}