For example, title is too long, so how do I have linebreak there?

Style file is: iopart.cls


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  • huh, what a long word! does it really exist? if your long title is composed from many (normal long) words than breaking title into more line should not be a problem. – Zarko May 9 '18 at 7:49
  • @Zarko unfortunately, it is long......I tried line breaking, but it only works on title not heading. – Nathan Explosion May 9 '18 at 7:52
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    please provide small but complete document that we can see what is going on. do you really need so long word in heading? does not exist a much shorter synonym? after your comment your question is less clear to me. – Zarko May 9 '18 at 7:58

The IOP template (iopart) allows to set a running title, which is displayed in the header line of each page. You can set this via:

\title[short running title]{much longer full title}

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