Example here e.g. on page 20 http://www.minuszerodegrees.net/manuals ... _APR84.pdf
I could create the box and that simulates it, but not as part of a chapter marker on each page:
Code: Select all
\documentclass{article}
\usepackage[explicit]{titlesec}
\usepackage{xcolor}
\usepackage{lipsum}
\usepackage{array}
\usepackage{makecell}
\usepackage{graphicx}
\usepackage{titlesec}
\newdimen\parboxheight
\makeatletter
\newcommand*{\org@iiiparbox}{}
\let\org@iiiparbox\@iiiparbox
\renewcommand*{\@iiiparbox}[2]{%
\ifx\relax#2%
\setlength{\parboxheight}{0pt}%
\else
\setlength{\parboxheight}{#2}%
\fi
\org@iiiparbox{#1}{#2}%
}
\makeatother
\setlength{\fboxsep}{-\fboxrule}
\titleformat{\section}[display]
{\normalfont\normalsize\bfseries}{}{0pt}{\colorbox{black}{\fbox{\parbox[][3.7cm][c]{1cm}{\centering\rotatebox{90}{\textcolor{white}{\thesection\quad#1}}}}}}
\titleformat{name=\section,numberless}
{\normalfont\normalsize\bfseries}{}{0em}{\colorbox{black}{\parbox{1cm}{\textcolor{white}{#1}}}}
\begin{document}
\setlength{\fboxsep}{-\fboxrule}
\section{Hardware}
\lipsum[4]
\section{Another Test Section}
\lipsum[4]
\section{Another Test Section with a long title spanning more than one line}
\lipsum[4]
\section*{An Unnumbered Test Section}
\lipsum[4]
\end{document}