# Customize the section title with Latin Modern

I have created a thesis using mathptmx font. Now I would like to customize only the section title using Latin Modern Sans Bold.

I used titlesec with

\usepackage{titlesec}
\titleformat{\section}
{\fontfamily{lmr}\sffamily\bfseries\Large}
{\thesection}{1em}{}

I would like to know if this is right because I'm not convinced.

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You should say \fontfamily{lmss}\bfseries\Large –  egreg Jan 18 '13 at 12:14
Thanks egreg. I didn't know the existence of that font family –  Mazzy Jan 18 '13 at 12:18

You should change the default sans serif family in your document, which is done by saying

\renewcommand{\sfdefault}{lmss}

in the preamble. Thus each call of \sffamily in the document will choose the Latin Modern Sans font corresponding to the other specifications. For setting the section title you'll simply say

\usepackage{titlesec}
\titleformat{\section}
{\sffamily\bfseries\Large}
{\thesection}
{1em}
{}

This is based on the obvious assumption that you should not have two different sans serif fonts in a document.

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