# Hide \thechapter for unnumbered Chapters

I want to display my Chapter-Numbers on the right below the Title. I came to the following minimal working example:

\documentclass{article}
\usepackage{titlesec}
\usepackage{marginnote}
\usepackage{lipsum} % for dummy text only
\titleformat{\section}[block]{\LARGE\selectfont}{}{0em}{}[\marginnote{\Huge\thesection}]

\begin{document}
\section{First section with\\linebreak}
\lipsum[2]
\section*{Unnumbered}
\lipsum[12]
\section{Three}
\lipsum[5]
\end{document}


However the unnumbered section now gets numbered as 1. How can I suppress \thesection for unnumbered sections? When I move the \marginnote to the <label> field in \titleformat the Number 'ignores' that the Title contains linebreaks and is positioned relative to the first line.

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I think I would use \llap instead of \marginnote – cmhughes Jun 28 '12 at 17:37
@cmhughes Could you give an example of using \llap instead of \marginnote? Why would you use it instead? – jacob11235 Jun 29 '12 at 6:51
I just compiled your MWE- nevermind, I see that \llap wouldn't produce the same results, my mistake – cmhughes Jun 29 '12 at 15:13

You can test whether the * version is being used by
\makeatletter

as \ttl@key@numberless is // for numbered form so the \if is true as the same character appears twice, and it is /* for the unnumbered section so the \if compares / and * which are false.