Back in college I was working in a group project where we produced a document which was quite large, as well as deep… and we had a need for a subsubsubsection. One of the group members, Ruslan Hristov (who was also the project leader where I worked on Skipper) cobbled together an early version of this, which I have kept since, modifying it as needed. It works as you would expect.

\makeatletter | |

\newcounter{subsubsubsection}[subsubsection] | |

\def\subsubsubsectionmark#1{} % Just list the number | |

\def\thesubsubsubsection {\thesubsubsection.\arabic{subsubsubsection}} | |

\def\subsubsubsection{ | |

\vspace{0.1in} | |

\@startsection | |

{subsubsubsection} % NAME | |

{4} % LEVEL | |

{\z@} % INDENT | |

{-3.25ex\@plus -0.1ex \@minus -.2ex} % BEFORESKIP | |

{0.2ex \@plus .01ex} % AFTERSKIP | |

{\normalsize\bf} % STYLE | |

} | |

\def\l@subsubsubsection{\@dottedtocline{4}{4.8em}{4.2em}} % TOC Entry |

This is also an opportune time to show how I add custom fonts to all of my sections using XeLaTeX’s **excellent** font rendering capabilities. Much of this code is originally from Manas Tungare’s original scripts.

\RequirePackage[cm-default]{fontspec} | |

\RequirePackage{xunicode} | |

\RequirePackage{xltxtra} | |

\defaultfontfeatures{Scale=MatchLowercase} | |

\def\@makechapterhead#1{% | |

\vspace*{50\p@}% | |

{\parindent \z@ \raggedright \sffamily | |

\ifnum \c@secnumdepth >\m@ne | |

\large \bfseries \@chapapp\space \thechapter | |

\par\nobreak | |

\vskip 10\p@ | |

\fi | |

\interlinepenalty\@M | |

\Huge \bfseries #1\par\nobreak | |

\vskip 20\p@ | |

}} | |

\def\@makeschapterhead#1{% | |

\vspace*{50\p@}% | |

{\parindent \z@ \raggedright | |

\sffamily | |

\interlinepenalty\@M | |

\Huge\bfseries #1\par\nobreak | |

\vskip 20\p@ | |

}} | |

\renewcommand\section{\@startsection {section}{1}{\z@}% | |

{-3.5ex \@plus -0.1ex \@minus -.2ex}% | |

{0.2ex \@plus.01ex}% | |

{\sffamily\large\bfseries}} | |

\renewcommand\subsection{\@startsection{subsection}{2}{\z@}% | |

{-3.25ex\@plus -0.1ex \@minus -.2ex}% | |

{0.2ex \@plus .01ex}% | |

{\sffamily\normalsize\bfseries}} | |

\renewcommand\subsubsection{\@startsection{subsubsection}{3}{\z@}% | |

{-3.25ex\@plus -0.1ex \@minus -.2ex}% | |

{0.2ex \@plus .01ex}% | |

{\sffamily\MakeUppercase\small\bfseries}} | |

\renewcommand\subsubsubsection{\@startsection{subsubsubsection}{4}{\z@}% | |

{-3.25ex\@plus -0.1ex \@minus -.2ex}% | |

{0.2ex \@plus .01ex}% | |

{\sffamily\MakeUppercase\small\bfseries}} |

Then you need to set your fonts:

\setsansfont[Mapping=tex-text,Scale=1.1]{Scrawler} | |

\setmainfont[Mapping=tex-text,Scale=1.0]{Lucida Grande} | |

\setmonofont{Courier} |

Now you have extended section depth and custom styling, and can forget you even changed anything.