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I wonder is there any way to change the format of section numbering from 1.1 to 1.1. ? I know this is trivial, but I really need to add one more dot after the section number. Does anybody know how to do that?

Thanks a lot

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The KOMA-Script classes have an option for this, if you’re using on of them consider the manual … – Tobi Jul 29 '11 at 19:22
Please see the right side, you can find more. It is one of them: How to change section numbering – xport Jul 29 '11 at 19:27
up vote 17 down vote accepted

You can do this simply with the titlesec package:

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Perfect. That's what I want. Thank you so much – Jason Xu Jul 29 '11 at 19:30

It depends on what you wish precisely. If you want that in all places the section number appears as "1.1.", also in cross references, the question is settled quite easily:


(in this case you would also change chapter numbers, for uniformity).

If you want only the number in the section title to be followed by a period, then you can follow Alan's good suggestion or delve into the internals (see the FAQ entry for more information):

\renewcommand{\@seccntformat}[1]{\csname the#1\endcsname.\quad}

This will change the format of all the sectional units also below \section. You might prefer the titlesec way to get more control on the appearance of the section headings.

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This is more compatible with microtype than titlesc. Which is to say, I've got a fix for this version, but not if titlesec is used. – cfr Nov 19 '15 at 23:47

If you use Komascript you may use the option numbers=endperiod.



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Thanks for adding an example corresponding to my above comment! – Tobi Jul 29 '11 at 21:59
After posting my answer I detected your comment - I needed some time to verify my knowledge ;) – knut Jul 30 '11 at 18:24

You can use the secdot package:

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