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I want to place a long bold \hrule-type line under the \section to make it more distinctive. How can I do that?

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Welcome to TeX.sx! Please add a minimal working example (MWE) that illustrates your problem. It is considered a lot better to put in some code that will compile, as it makes it a lot easier for us to copy it into our text editor and work with it, and see exactly what it is you are trying to do. – henrique Nov 24 '12 at 15:39
up vote 25 down vote accepted

You can use the titlesec package; the optional argument for \titlerule allows you to control the rule "thickness":




\section{Test Section}


enter image description here

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Thanks a lot! It works! – lhhNJU Nov 25 '12 at 6:36
And for the width? Because default is \textwidth... – FormlessCloud May 3 '13 at 20:13
@FormlessCloud can you please expand your question a little? I don't understand what you mean. Do you want the line only to cover the title and not the whole text width? – Gonzalo Medina May 3 '13 at 20:23
Sure, for example, if I would a \titlerule that have the width of for example .5\textwidth how can I do this? Because if I type only \titlerule that command give me automatically a rule that fit the entire width of my page. In sinthesys I would to adjust the length (or I can call it width, how you prefer) of my line. – FormlessCloud May 3 '13 at 20:46
@FormlessCloud Ah, I see. In that case, instead of [{\titlerule[0.8pt]}] you can use something like [\vskip-10pt{\makebox[\linewidth][l]{\rule{0.5\textwidth}{0.8pt}}}] (adjusting the vertical skip, if necessary). Changing the settings for the \makebox you can also obtain lines wider than the \textwidth. – Gonzalo Medina May 3 '13 at 20:56

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