Breaking long section titles in table of contents

Question

Is it possible to tune LaTeX to break automatically long (sub-) section titles in the table of contents?

Answer 1

You can manually set the title that appears in the TOC like this:

\section[Lorem ipsum]{Lorem ipsum dolor sit amet}

That way the "long title" appears on the section itself, and the "short title" appears in the TOC. I haven't tried it, but it might be possible to use the same number of words in the square brackets but insert manual line-breaks with \\.