在写论文的某个时候，我从章节标题中删除了数字，现在我找不到删除数字的行。我想让数字/字母重新出现在那里。抱歉，这不是一个可行的例子。
我怀疑错误出在
\titleformat{\chapter}[hang]
{\normalfont\huge\filcenter\bfseries}
{\thechapter}
{0.5em}
{}
，因为它打印的是 chapter 的默认样式带有编号如果我删除它。我以为 \thechapter 也会打印数字（在我的情况下是字母），但在我的情况下它没有这样做。如果我想在那里显示数字，该行的正确表达式是什么？
这是文档
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\hyphenation{Mit-tel-stre-cken-ra-ke-ten Ver-ei-ni-gung Lu-xem-burg Lan-des-vor-sitz-en-der Meck-len-burg-Vor-pom-mern Weih-nach-ten Aus-ein-an-der-setz-ung Ver-ant-wort-ung Kom-mu-nis-ti-schen So-w-jet-uni-on hun-der-te Stell-ver-tre-ter}
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\input{HistorischerTeil}
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\input{SystematischerTeil}
\input{wirkungsgeschichte}
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% \restoregeometry
% \resetHeadWidth
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\section*{Dokumente}
\begin{figure}[h!]
\includegraphics[width=1.0\textwidth]{tisa}
\caption{Holzschnitt 1/50 mit dem Titel "Wir bleiben hier. Schliesst euch an. Rostock. Oktober '89.", Elisabeth "Tisa" von der Schulenburg}
\label{fig:tisa}
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\pagebreak
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\caption{Fragebogenvorlage}
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\printbibliography[keyword=literatur,title=Literaturverzeichnis,heading=caption]
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\pagebreak
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\pagebreak
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% \printbibliography
%\include{danksagung}
% ö Ö Ü ü Ä ä
%\include{lebenslauf}
\end{document}
答案1
答案是使用block选项而不是hang
因此正确的做法是：
\titleformat{\chapter}[block]
{\normalfont\huge\filcenter\bfseries}
{\thechapter}
{0.5em}
{}