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I have a tex file with several written chapters. Then I found I need to nest one of them to another. I know this can be done by manually changing the sectioning command one by one but I found it really time consuming and a bit dumb :p

for example, I now have this document

\chapter{big nest}
\chapter{i want to be a section}

I want to nest chapter{i want to be a section} into chapter{big nest} and after compiling, in Table of Contents it should look in a structure like:

\chapter{big nest}

    \section{i want to be a section}

Question: Is there a clever way to nest an entire written chapter into another chapter?

By the way, I'm sorry for my poor language and hope you understand my question. I also have tried to search for related topic but I don't know the correct words so I got no related search results. Maybe there is, please let me know. Thank you.

marked as duplicate by Guido, user13907, dustin, Andrew, egreg sectioning Sep 25 '14 at 21:42

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