% +--------------------------------------------------+
% | Typeset this file to get the documentation.      |
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%
% Copyright (c) 1998 1999 2000 by Javier Bezos.
% All Rights Reserved.
%
% This file is part of the titlesec distribution release 2.3.5
% -----------------------------------------------------------
%
% This program can be redistributed and/or modified under the terms
% of the LaTeX Project Public License Distributed from CTAN
% archives in directory macros/latex/base/lppl.txt; either
% version 1 of the License, or any later version.

\def\fileversion{2.3.5}
\def\docdate{June 14, 2000}

\documentclass{ltxguide}
\usepackage[bf,sf,compact,topmarks,calcwidth,pagestyles]{titlesec}
\usepackage{titletoc}
\def\gobble#1{}
\def\cs#1{\expandafter\gobble\string\\#1}

\title{The \textsf{titlesec} and \textsf{titletoc} 
Packages\footnote{The \textsf{titlesec} package is currently at 
version 2.3.5.  \copyright{} 1998, 1999, 2000 Javier Bezos.
The \textsf{titletoc} package is currently at 
version 1.2.2.  \copyright{} 1999, 2000 Javier Bezos.  All Rights 
Reserved.}}

\author{Javier Bezos\footnote{Please, send bug reports (with
a sample file), comments and suggestions
to \texttt{jbezos@wanadoo.es}, or
to my postal address: Apartado 116.035, E-28080 Madrid, Spain.
English is not my strong point, so contact me when you
find mistakes in the manual. Other packages by the same author:
\textsf{gloss} (with Jos\'e Luis D\'{\i}az), \textsf{accents,
polyglot, tensind, esindex}.}}

\date{June 14, 2000}

\widenhead{2.1pc}{0pc}
\titlelabel{\thetitle.\quad}

\renewpagestyle{plain}[\small\sffamily\slshape]{
  \footrule
  \setfoot{}{\usepage}{}}

\newpagestyle{myps}[\small\sffamily\slshape]{
  \headrule
  \sethead{Titlesec}{\sectiontitle}{\usepage}}
  
\pagestyle{myps}

\newcommand{\examplesep}{%
  \begin{center}%
    \rule{4pt}{4pt}%
  \end{center}}

\contentsmargin{0pt}
\titlecontents{section}[1.8pc]
  {\addvspace{3pt}\bfseries}
  {\contentslabel[\thecontentslabel.]{1.8pc}}
  {}
  {\quad\thecontentspage}

\titlecontents*{subsection}[1.8pc]
  {\small}
  {\thecontentslabel. }
  {}
  {, \thecontentspage}
  [.---][.]

\addtolength{\topmargin}{-3pc}
\addtolength{\textwidth}{6pc}
\addtolength{\oddsidemargin}{-2pc}
\addtolength{\textheight}{7pc}

\raggedright
\parindent1em
\parskip0pt

\begin{document}

\maketitle
\tableofcontents
\section{Introduction}

This package is essentialy a replacement---partial or total---for the 
\LaTeX{} macros related with sections---namely titles, headers and 
contents.  The goal is to provide new features unavailable in current 
\LaTeX{}; if you just want a more friendly interface than that of 
standard \LaTeX{} but without changing the way \LaTeX{} works you may 
consider using |fancyhdr|, by Piet van Oostrum, |sectsty|, by Rowland 
McDowell, and |tocloft|, by Peter Wilson, which you can made pretty 
things with.

Some of the new features provided are:
\begin{itemize}
\item Different classes and ``shapes'' of titles, with tools for very 
fancy formats.  You can define different formats for left and right 
pages, or numbered and unnumbered titles, measure the width of the 
title, add a new section level, use graphics, and many more.  The 
Appendix shows a good deal of examples, so jump forward right now!

\item Headers and footers defined with no |\...mark| intermediates,
and perhaps containing top, first \emph{and} bot marks at time.
Top marks correctly syncronized with titles, and without 
uncompatibilities with the float mechanism. Decorative elements easily
added, including picture environments.

\item Pretty free form contents, with the possibility of grouping 
entries of differents levels in a paragraph or changing the format
of entries in the middle of a document.
\end{itemize}

\textsf{Titlesec} works with the standard classes and with many 
others, including the AMS ones, and it runs smoothly with 
\textsf{hyperref}.\footnote{However, be aware that the 
AMS classes reimplement the original internal commands.  These changes 
will be lost here. The compatibility with \textsf{hyperref} has been
tested with \textsf{dvips} only and it's an unsupported feature. 
Please, check that your version of \textsf{hyperref} is compatible
with \textsf{titlesec}.}

As usual, firstly load the package in the standard way with 
|\usepackage|.  Then, redefine the sectioning commands with the 
simple, predefined settings (see section ``Quick Reference'') or with 
the provided commands if you want more elaborated formats (see section 
``Advanced Interface.'')  In the latter case, you only need to 
redefine the commands you'll use.  Both methods are available at time, 
but because |\part| is usually implemented in a non-standard way, it 
remains untouched by the simple settings and should be changed
with the help of the ``Advanced Interface.''


\section{Quick Reference}
%~~~~~~~~~~~~~~~~~~~~~~

The easiest way to change the format is by means of a set of package 
options and a couple of commands. If you feel happy with the
functionality provided by this set of tools, you needn't go
further in this manual. Just read this section and ignore the
subsequent ones.

\subsection{Format}

There are three option groups controlling font, size and align.  You 
need not set all of these groups, since a default is provided for each 
one; however, you must use at least an option from them if you want
this ``easy setup.'' 
\begin{decl}
|rm sf tt md bf up it sl sc|
\end{decl}
Select the corresponding family/series/shape.  Default is |bf|.  

\begin{decl}
|big medium small tiny|
\end{decl}
Set the size of titles.
Default is |big|, which gives the size of standard classes.
With |tiny|, sections (except chapters) are typed in the text
size. |medium| and |small| are intermediate layouts.

\begin{decl}
|raggedleft center raggedright|
\end{decl}

Control the alignment.
Don't use |raggedright| if the document itself is already 
|\raggedright|.

\subsection{Spacing}

\begin{decl}
|compact|
\end{decl}
This option is independent from those above and reduces the spacing
above and below the titles.

\subsection{Tools}

\begin{decl}
|\titlelabel{<label-format>}|
\end{decl}
Changes the label format in sections, subsections, etc. A
|\thetitle| command is provided which is respectively |\thesection|,
|\thesubsection|, etc. The default value in standard classes is
\begin{verbatim}
\titlelabel{\thetitle\quad}
\end{verbatim}
and you may add a dot after the counter simply with
\begin{verbatim}
\titlelabel{\thetitle.\quad}
\end{verbatim}
That was done in this document.

\section{Advanced Interface}
%~~~~~~~~~~~~~~~~~~~~~~~~

Two commands are provided to change the title format.  The first one 
is used for the ``internal'' format, i.~e., shape, font, label\dots, 
the second one defines the ``external'' format, i.~e., spacing before 
and after, indentation, etc. This scheme is intended to easy 
definitions, since in most of cases you will want to modify either 
spacing or format.\footnote{Information is ``extracted'' from the 
class sectioning commands, except for chapter and part.  Standard 
definitions with |\cs{@startsection}| are presumed, and if an 
special procedure was followed an arbitary value is provided, which 
you may change later.  (Sadly, there is no way to catch the chapter or 
part formats and one similar to that of standard classes will be 
used.)} Note that that redefines existing sectioning commands, but
does not define \emph{new} ones. New sections are defined with
|\titleclass|, as described below.

\subsection{Format}

A set of shapes is provided, which controls the basic distribution of
elements in a title. The available shapes are:
\begin{description}
\item[hang] is the default value, with a hanging label.  (Like the 
standard |\section|.)

\item[block] typesets the whole title in a block (a paragraph) without 
additional formatting.  Useful in centered titles\,\footnote{The label 
will be slightly displaced to the left if the title is two or more 
lines long and the \texttt{hang} shape is used, except with explicit 
|\string\\|.} and special formatting (including graphic tools such as 
|picture|, |pspicture|, etc.)

\item[display] puts the label in a separate paragraph. (Like the
standard |\chapter|.)

\item[runin] A run-in title.  (Like the standard |\paragraph|.)

\item[leftmargin] puts the title at the left margin.  Titles at the 
very end of a page will be moved to the next one and will not stick 
out in the bottom margin, which means that large titles can lead to 
underfull pages.\footnote{However, floats following the title a couple 
of lines after will interfere with the page breaking used here and 
sometimes the title may stick out.} In this case you may increase the 
strechability of the page elements, use |\raggedbottom| or use the 
package option |nobottomtitles| described below.  Since the mechanism 
used is independent from that of the margin pars, they can overlap.  
|margin| is a synonymous.

\item[rightmargin] is like |leftmargin| but at the right margin.

\item[drop] wraps the text around the title, provided that the
first paragraph is longer than the title (if not, they overlap).
The comments in |leftmargin| also applies here. 

\item[wrap] is quite similar to drop.  The only difference is that 
while the space reserved in drop for the title is fixed, in wrap is 
automatically readjusted to the longest line.  The limitations 
explained below related to |calcwidth| also applies here.

\item[frame] similar to display, but the title will be framed.
\end{description}

Note, however, that some shapes don't make sense in chapters and
parts.

\begin{decl}
|\titleformat{<command>}[<shape>]{<format>}{<label>}{<sep>}{<before>}[<after>]|
\end{decl}

Here
\begin{itemize}
\item |<command>| is the sectioning command to be redefined, i.~e., 
|\part|,
|\chapter|, |\section|, |\subsection|, |\subsubsection|, |\paragraph| 
or |\subparagraph|.

\item The paragraph shape is set by |<shape>|, whose possible
values are those described above.

\item |<format>| is the format to be applied to the whole 
title---label and text. This part can contain vertical material
which is typesseted just after the space above the title.

\item The label is defined in |<label>|.  You may omit it if
there is no section label at that level, but note that by removing
it the number is not suppressed in the table of contents and
running heads.
 
\item |<sep>| is the horizontal separation between label and title 
body and must be a length.  This space is vertical in |display| 
shape; in |frame| it is the distance from text to 
frame.  Both |<label>| and |<sep>| are ignored in starred versions of 
sectioning commands.  If you are using |picture| and the like, set 
this parameter to 0 pt.

\item |<before>| is code preceding the title body. The 
very last command can take an argument, which is the title text.

\item |<after>| is code following the title body. The typeset
material is in vertical mode with |hang|, |block| and |display|;
in horizontal mode with |runin|. Otherwise is ignored.
\end{itemize}

\begin{decl}
|\chaptertitlename|
\end{decl}

It defaults to |\chaptername| except in appendices where it
is |\appendixname|. Use it instead of |\chaptername| when defining
a chapter.

\subsection{Spacing}

\begin{decl}
|\titlespacing*{<command>}{<left>}{<beforesep>}{<aftersep>}[<right>]|
\end{decl}

The starred version kills the indentation of the paragraph 
following the title, except in |drop|, |wrap| and |runin| where this
possibility does not make sense.
\begin{itemize}
\item |<left>| increases the left margin, except in the |...margin|, 
and |drop| shape, where this parameter sets the title width, in 
|wrap|, the maximum width, and in |runin|, the indentation just before 
the title.  With negative value the title overhangs.\footnote{This 
parameter is not equal to |<indent>| of |\cs{@startsection}|, which 
doesn't work correctly.  With a negative value in the latter and if 
|<indent>| is larger than the label width, the first line of the title 
will start in the outer margin, as expected, but the subsequent lines 
will not; worse, those lines will be shortened at the right margin.}

\item |<beforesep>| is the vertical space before the title.

\item |<aftersep>| is the separation between title and text---vertical 
with |hang|, |block|, and |display|, and horizontal with |runin|, 
|drop|, |wrap| and |...margin|.  By making the value negative, you may 
define an effective space of less than |\parskip|.\footnote{See 
Goosens, Mittelbach and Samarin: \textit{The \LaTeX{} Companion}, 
Reading, Addison Wesley, 1993, p.~25.}

\item The |hang|, |display|, |block| and |display| shapes have the 
possibility of increasing the |<right>| margin with this optional 
argument.
\end{itemize}

If you dislike typing the full skip values, including the |plus|
and |minus| parameters, an abreviation |*|$n$ is provided (where $n$
is an integer). In the |<beforesep>| argument this is equivalent to 
$n$ |ex| with some stretchability and a minute shrinkability. In the
|<aftersep>| some strechability (smaller) and no shrinkability.%
\footnote{They stand for $n$ times |1ex plus .3ex minus .06ex| and
|1ex plus .1ex|, respectively.} Thus, you can write
\begin{verbatim}
\titlespacing{\section}{0pt}{*4}{*1}
\end{verbatim}

\textbf{Note.} |\titlespacing| does not work with neither |\chapter|
nor |\part| unless
you change its title format as well by means of |\titleformat|,
the simple settings, or |\titleclass|.

\subsection{Spacing related tools}

These commands are provided as tools for |\titleformat| and 
|\titlespacing|.

\begin{decl}
|\filright  \filcenter  \filleft  \fillast  \filinner  \filouter|
\end{decl}

Variants of the |\ragged...| commands, with slight
differences.  In particular, the |\ragged...| commands cancels
the left and right spaces setted by |\titlespacing|.
|\fillast| justifies the paragraph, except the last line 
which is centered.  If the document is |\raggedright| you must reset 
the value of |\rightskip| to 0 pt before, or some irregular format 
can arise.
These commands work in the |frame| label, too.

|\filinner| and |\filouter| are |\filleft| or |\filright| depending
on the page. Because of the asyncronous \TeX{} page 
breaking, these commands can be used in |\chapter| only.

\begin{decl}
|\wordsep|
\end{decl}

The inter-word space of the current font. 

\begin{decl}
|indentfirst nonindentfirst| \quad (Package options)
\end{decl}

By-pass the settings for all of sectioning commands.


\begin{decl}
|rigidchapters rubberchapters| \quad (Package options)
\end{decl}

With |rigidchapters| the space for chapter titles is always the same 
and |<aftersep>| in |\titlespacing| is the total amount reserved to 
them, i.~e., |<beforesep>| $+$ |<aftersep>| is the distance from the 
top of the page body to the main text.  The default is 
|rubberchapters| where |<aftersep>| is the separation between title 
and text, as usual.  Actually, the name is misleading because it 
applies not only to the default chapter, but to any title of top 
class.  (More on classes below.)

\begin{decl}
|bottomtitles nobottomtitles nobottomtitles*|  \quad (Package options)
\end{decl}

If the |nobottomtitles| is set, titles close to the bottom margin will 
be moved to the next page and the margin will be ragged.  The minimal 
space required in the bottom margin not to move the title is set 
(approximately) by
\begin{verbatim}
\renewcommand{\bottomtitlespace}{<length>}
\end{verbatim}
whose default value is |.3\textheight|.  A simple ragged bottom on the 
page before is obtained with a value of 0 pt.  |bottomtitles| is the 
default, which simply sets |\bottomtitlespace| to a negative value.

The |nobottomtitles*| option provides more accurate computations but
titles of |margin|, |wrap| or |drop| shapes could be badly 
placed. Usually, you should use this starred version.

\begin{decl}
|aftersep largestsep|  \quad (Package options)
\end{decl}

By default, when there are two consecutive titles the |<aftersep>| 
space from the first one is used between them.  Sometimes that is not 
the desired behaviour, especially when the |<beforesep>| space is much 
larger than the |<aftersep>| one (otherwise the default seems 
preferable).  With |largestsep| the largest of them is used.  
|aftersep| is the default.

\subsection{Rules}

The package includes some tools for helping in adding rules and other
stuff below or above the title. Since the margins in titles may be modified,
these macros take into account the local settings to place rules properly.
They also take into account the space used by marginal titles.

\begin{decl}
|\titleline[<align>]{<horizontal material>}|\\
|\titlerule[<height>]|\\
|\titlerule*[<width>]{<text>}|
\end{decl}

The |\titleline| command allows inserting a line, which may
contain text and other ``horizontal'' material. It's intended 
mainly for rules and leaders but in fact is also useful for other 
purposes.  The line has a fixed width and hence must be filled, i.e., 
|\titleline{CHAPTER}| produces an underfull box.  Here the optional 
|<align>| (|l|, |r| or |c|) helps, so that you simply type, say, 
|\titleline[c]{CHAPTER}|.%
\footnote{The default is the \texttt{s} parameter of the
\texttt{\cs{makebox}} command.}

Using |\titleline| in places where vertical material is not expected 
can lead to anomalous results.  In other words, you can use it in the 
|<format>| (always) and |<after>| (|hang|, |display| and |block|) 
arguments; and in the |display| shape at the very beginning of the 
|<before>| and |<label>| argument as well.  But try it out, because 
it's very likely it works in other places.

The |\titlerule| command, which makes use of |\titleline| if
necessary, can be used to build rules and fillers. The unstarred
version draws rules of height .4 pt or |<height>|, if present.
The starred version makes leaders with the |<text>|
repeated in boxes of its natural width. The width of the boxes
can be changed to |<width>|, but the first box remains with
its natural width so that the |<text>| is aligned to the left
and right edges of the space to be filled.

For instance, with
\begin{verbatim}
\titleformat{\section}[leftmargin]
  {\titlerule*[1pc]{.}%
   \vspace{1ex}%
   \bfseries}
  {... definition follows
\end{verbatim}
leaders spanning over both main text and title precede the section.

\begin{decl}
|calcwidth| \quad (Package option)
\end{decl}

The |wrap| shape has the capability of measuring the lines in the title 
to format the paragraph.  This capability may be extended to other 
three shapes---namely |display|, |block| and |hang|---with this 
package option.  The length of the longest line is returned in 
|\titlewidth|.

As far as \TeX{} is concerned, any box is considered typeset material.  
If the box has been enlarged with blank space, or if conversely a box 
with text has been smashed, the value of |\titlewidth| may be wrong 
(as far as humans are concerned).  The |hang| shape, for instance, 
uses internally such a kind of boxes, but in this case this behaviour 
is desired when the title is flushed right; otherwise the |block| 
shape produces better results.  In other words, using boxes whose 
natural width has been overriden may be wrong.  Further, some commands 
may confuse \TeX{} and stop parsing the title.  But if you stick to 
text, |\\| and |\\[...]| (and it's very unlikely you might want 
something else), there will be no problems.  Another important 
point is that the |<before>|, |<label>|, |<sep>|, and |<title>| 
parameters (but not |<after>|) are evaluated twice at local scope; if 
you increase \emph{globally} a counter, you are increasing it twice.  
In most of cases, placing the conflicting assignment in the |<after>| 
parameter will be ok.

We now describe a variant of |\titleline|.
\begin{decl}
|\titleline*[<align>]{<horizontal material>}|
\end{decl}
The text will be enclosed first in a box of width |\titlewidth|; this box
will be in turn enclosed in the main box with the specified alignment.

\subsection{Breaks}

\begin{decl}
|\sectionbreak    \subsectionbreak     \subsubsectionbreak|\\
|\paragraphbreak  \subparagraphbreak|
\end{decl}

By defining these command with |\newcommand| different page breaks
could be applied to different levels. In those undefined, a penalty
with the internal value provided by the class is used (typically
$-300$). For instance,
\begin{verbatim}
\newcommand{\sectionbreak}{\clearpage}
\end{verbatim}
makes sections begin a new page. In some stylings, the space
above the title is preserved even if the section begins a new
page; that's accomplished with:
\begin{verbatim}
\newcommand{\sectionbreak}{%
  \addpenalty{-300}%
  \vspace*{0pt}}
\end{verbatim}

\subsection{Other Package Options}

\begin{decl}
|newparttoc oldparttoc| \quad (Package options)
\end{decl}

Standard parts write the toc entry number in a non standard way.
You may change that with |newparttoc| so that \textsf{titletoc}
or a similar package can manipulate the entry. (That works only if
|\part| has been redefined.)

\begin{decl}
|clearempty| \quad (Package options)
\end{decl}

Modifies the behaviour of |\cleardoublepage| so that the |empty| page 
style
will be used in empty pages.

\subsection{Extended Settings}
%~~~~~~~~~~~~~~~~~~~~~~~~~

The first argument of |\titleformat| has an extended syntax which 
allows to set different formats depending on the context.\footnote{% 
The \textsf{keyval} package is required for making use of it.} This 
argument can be a list of key/value pairs in the form:
\begin{decl}
|<key>=<value>, <key>=<value>, <key>, <key>,...|
\end{decl}
Currently, only pages and unnumbered versions are taken care of,
besides the sectioning command name. Thus, the available keys are:
\begin{itemize}
\item |name|. Allowed values are |\chapter|, |\section|, etc.
\item |page|. Allowed values are |odd| or |even|.
\item |numberless|. A valueless key. It's not necessary unless you
want to set different numbered (without this key) and unnumbered
(with |numberless|) variants.
\end{itemize}
The basic form described above with the name of a sectioning
command, say
\begin{verbatim}
\titleformat{\section} ...
\end{verbatim}
is an abbreviation for
\begin{verbatim}
\titleformat{name=\section} ...
\end{verbatim}

Let's suppose that we'd like a layout with titles in the
outer margin. We may set something like
\begin{verbatim}
\titleformat{name=\section,page=even}[leftmargin]
  {\filleft\scshape}{\thesection}{.5em}{}

\titleformat{name=\section,page=odd}[rightmargin]
  {\filright\scshape}{\thesection}{.5em}{}
\end{verbatim}
Since the page information is written to the |aux| file, at
least two runs are necessary to get the desired result.

The ``number'' version is usually fine when generating unnumbered
variants, but if you need some special formatting, there is the
|numberless| key which defines an alternative version for sections
without numbers (namely those with level below |secnumdepth|,
in the front and back matters and, of course, the starred version).
For instance
\begin{verbatim}
\titleformat{name=\section}{...% The normal definition follows
\titleformat{name=\section,numberless}{...% The unnumbered
% definition follows
\end{verbatim}
Neither |<label>| nor |<sep>| are ignored in |numberless|
variants.

These keys are available to both |\titleformat| and
|\titlespacing|. By using |page| in one (or both) of them, odd and
even pages will be formatted differently. Actually,
``even'' and ``odd'' are well established \LaTeX{} terms, but
misleading. In one side printing the ``odd'' pages refer
to ``even'' pages as well (cf.\@ |\oddsidemargin|.)

If you intend to create different odd/even \emph{and} 
different numbered/unnumbered versions, it's recommended defining
the four variants. 

If you remove the page specifier from a sectioning command you
must remove the |.aux| file.

\subsection{Creating new levels}

While the shapes and the like modifies the behaviour of titles related 
to the surrounding text, title classes allows to change the generic 
behaviour of them.  With the help of classes you may insert, say, a 
new |subchapter| level between |chapter| and |section|, or creating a 
scheme of your own.  \emph{Making a consistent scheme and defining all 
of related stuff like counters, macros, format and spacing is left to 
the responsability of the user.} There are three classes: |page| is 
like the book |\part|, in a single page, |top| is like |\chapter|, 
which begins a page and places the title at the top, and |straight| is 
intended for titles in the middle of text.\footnote{There is an 
further class named |part| to emulate the article |\cs{part}|, but 
you should not use it at all.  Use the |straight| class instead.}

\begin{decl}
|\titleclass{<name>}[<top-num>]{<class>}|\\
|\titleclass{<name>}{<class>}[<sup-level>]|
\end{decl}

If you don't use the optional arguments, you just change
the |<class>| of |<name>|. For example:
\begin{verbatim}
\titleclass{\part}{straight}
\end{verbatim}
makes |part| of |straight| class.

When the first form is used in full, the |<name>| title is considered 
the top level, with |<top-num>| level number.  It should be used only 
when creating sectioning command from scratch.  When the second form 
is used, the level number is the following of |<sup-level>|.  For 
example:
\begin{verbatim}
\titleclass{\subchapter}{straight}[\chapter]
\newcounter{subchapter}
\renewcommand{\thesubchapter}{\Alph{subchapter}}
\end{verbatim}
creates a level under chapter (some additional code is shown as well).
If the chapter level is 0, then the subchapter one is 1; the levels 
below are increased by one (section is 2, subsection is 3, and so on).

There are two sectioning commands which perform some extra actions
depending of its name and ignoring the class:
\begin{itemize}
\item |\chapter| logs the string defined in |\chaptertitlename|
 and the matter is taken into account.
\item |\part| does not encapsulates the label in the toc entry,
except if you use the |newparttoc| option.
\end{itemize}

\begin{decl}
|loadonly| \quad (Package option)
\end{decl}

Now, you want create your sectioning commands from scratch.
This package option ignores any previous definitions, if any,
and hence removes the possibility of using the option described
in ``Quick Reference.'' Then you use the \textsf{titlesec}
tools, and define the corresponding counters and labels.

\section{Additional Notes}
%~~~~~~~~~~~~~~~~~~~~~~~~

This part describes briefly some \LaTeX{} commands, useful
when defining sectioning titles.

\subsection{Fixed Width Labels}

The |\makebox| command allows to use fixed width label, which
makes the left margin of the actual title (not the label) to lie
in the same place. For instance (only the relevant code is
provided):
\begin{verbatim}
\titleformat{\section}
  {..}
  {\makebox[2em]{\thesection}}{..}{..}
\end{verbatim}

See your \LaTeX{} manual for further reference on boxing commands.

\subsection{Starred Versions}
\label{s:starred}

The use of sectioning commands in the starred version is strongly 
discouraged.  Instead, you can use a set of markup oriented commands 
which are easy to define and modify, if necessary.  Thus, you can test 
different layouts before choosing amongst them.

Firstly remember that if you say
\begin{verbatim}
\setcounter{secnumdepth}{0}
\end{verbatim}
sections will be not numbered but they will be included in both toc
and headers.

Now, let's
suppose that you want to include some sections with a special content;
for example, a section (or more) with exercises. We will use an
environment named |exercises| whose usage is:
\begin{verbatim}
\section{A section}
Text of a normal section.

\begin{exercises}
\section{Exercises A}
Some exercises

\section{Exercises B}
Some exercises
\end{exercises}
\end{verbatim}

The following definition supresses numbers but neither toc lines
nor headers.
\begin{verbatim}
\newenvironment{exercises}
  {\setcounter{secnumdepth}{0}}
  {\setcounter{secnumdepth}{2}}
\end{verbatim}

The following one adds a toc line but headers will remain
untouched:
\begin{verbatim}
\newenvironment{exercises}
 {\setcounter{secnumdepth}{0}%
  \renewcommand\sectionmark[1]{}}
 {\setcounter{secnumdepth}{2}}
\end{verbatim}

The following one updates the headers but there will be
no toc line:
\begin{verbatim}
\newenvironment{exercises}
 {\setcounter{secnumdepth}{0}%
  \addtocontents{toc}{\protect\setcounter{tocdepth}{0}\ignorespaces}}
 {\setcounter{secnumdepth}{2}%
  \addtocontents{toc}{\protect\setcounter{tocdepth}{2}\ignorespaces}}
\end{verbatim}
(I find the latter a bit odd in this particular example; the
first and second options are more sensible. The |\ignorespaces|
is not very important, and you needn't it unless there is
unwanted space in the toc.)

That works with standard classes, but if you are using
\textsf{fancyhdr} or \textsf{titlesec} to define headers you need 
further refinement to kill the section number. In \textsf{titlesec}
that's accomplished with |\ifthesection| (see below).

As you can see, there are no |\addcontentsline|, no
|\markboth|, no |\section*|, just logical structure. Of 
course you may change it as you wish; for example if you decide
that these sections should be typeset in small typeface, include
|\small|, and if you realize that you don't like that, remove it.

While the standard \LaTeX{} commands are easier and more
direct for simple cases, I think the proposed method above is
far preferable in large documents.

\subsection{Variants}

Let's suppose we want to mark some sections as ``advanced topics''
with an asterisc after the label.
The following code does the job:
\begin{verbatim}
\newcommand{\secmark}{}
\newenvironment{advanced}
  {\renewcommand{\secmark}{*}}
  {}
\titleformat{\section}
  {..}
  {\thesection\secmark\quad}{..}{..}
\end{verbatim}

To mark the sections write
\begin{verbatim}
\begin{advanced}
\section{...}
...
\end{advanced}
\end{verbatim}

That marks sections but not subsections. If you like being
redundand and marking the subsection level as well, you must
define it accordingly.

\subsection{Putting a Dot after the Section Title}

Today this styling is not used, but formerly it was fairly common.
The basic technique was described above, but here is a reminder:
\begin{verbatim}
\newcommand{\periodafter}[1]{#1.}
\titleformat{\section}
 {..}
 {\thesection}{..}{..\periodafter}
\end{verbatim}

If you had to combine that dot with some command (perhaps an
underlining), you can say:
\begin{verbatim}
\newcommand{\periodafter}[2]{#1{#2.}}
\titleformat{\section}
 {..}
 {\thesection}{..}{..\periodafter{\ul}} % \ul from soul package
\end{verbatim}

\section{Page Styles}
%~~~~~~~~~~~~~~~~~~~

As a part of this package a set of commands are provided for one-step 
headline and footline settings. Those page styles has been designed to work
with sectioning related information; you shouldn't use to create
headers with the first an last entry of a page in a dictionary,
for example (you could, but it's more complicated than with
\textsf{fancyhdr}).

It works with standard classes and many others; however, additional \LaTeX{} 
layout 
adjustments could be necessary in some of them (for instance the 
\textsc{AMS} classes).\footnote{%
Two columns layout requires the 
\textsf{fixmarks} package by Joe Pallas and Piet van Oostrum.  
However, this package does not fix twocolumn${}+{}$starred sectioning 
commands.} For using them, set the following package option:\footnote{The
way pagestyles works have been reimplemented in full. However, in most
of cases you won't notice it at all.}
\begin{decl}
|pagestyles|
\end{decl}

\subsection{Definining Page Styles}

\begin{decl}
|\newpagestyle{<name>}[<global-style>]{<commands>}|\\
|\renewpagestyle{<name>}[<global-style>]{<commands>}|
\end{decl}

Defines a new style or redefines an existing one, named |<name>|.  
For convenience, end of lines are ignored, and you needn't ``hide'' 
them with |%|.\footnote{Even if marks should be reserved to
pass information to headers, some classes, like AMS ones, introduce additional
code. When redefining the |plain| style of AMS classes, you must add the 
following line:
|\cs{global}\cs{topskip}\cs{normaltopskip}|.}

|<global-style>| is any command to be applied to both footlines and 
headlines. Fragile commands are allowed.

In |<commands>| you can use (these commands are local to a page
style, i.e., defining them directly in the preamble will
not work because the page style settings will override them):

\begin{decl}
|\headrule              \footrule|\\
|\setheadrule{<length>}  \setfootrule{<length>}|
\end{decl}

If you want a rule below the headline and above the footline.  You may 
also set their width directly with the commands |\setheadrule| and 
|\setfootrule|.  (For instance, |\setheadrule{.4pt}| which is, by the 
way, the default value.)

\begin{decl}
|\makeheadrule \makefootrule|
\end{decl}

These commands are used by \textsf{titlesec} to typeset the rules.
If there is no rule, both commands are empty (this value is the 
default).
|\setheadrule{d}| just stands for
\begin{verbatim}
\renewcommand{\makeheadrule}{\rule[-.3\baselineskip]{\linewidth}{d}}
\end{verbatim}
unless if |d| is 0 pt, which empties
|\makeheadrule| (and similarly |\setfootrule|).

You can access the total head/foot width with |\linewidth|
but the box enclosing the rule is in fact dimensionless. Hence,
you must be concerned with the rule placement only. Its
baseline is the same than that of the head/foot. That means that the
material to be used as rule should be raised or lowered with
|\raisebox|, the lifting argument in |\rule| or by using sensible
coordinates in |picture|, for instance. That makes easy to
put material above \emph{and} below. For instance,
the following code creates a headline with a black bold line
above and a red rule below (the \textsf{color} package is required):
\begin{verbatim}
\renewcommand{\makeheadrule}{%
    \makebox[0pt][l]{\rule[.7\baselineskip]{\linewidth}{0.8pt}}%
    \color[named]{Red}%
    \rule[-.3\baselineskip]{\linewidth}{0.4pt}}
\end{verbatim}

Of course, the material to be used
as rule is not restricted to actual rules; pictures and leaders, for 
instance, are allowed, too.

\begin{decl}
|\sethead[<even-left>][<even-center>][<even-right>]|\\
|        {<odd-left>}{<odd-center>}{<odd-right>}|\\
|\setfoot[<even-left>][<even-center>][<even-right>]|\\
|        {<odd-left>}{<odd-center>}{<odd-right>}|
\end{decl}

Set the corresponding part in heads and foots.  The optional arguments 
are all or none.  If no optional arguments are given the odd-page 
settings applies to both even and odd pages.  A couple of starred 
variant (|\setfoot*|, |\sethead*|) reverses the order of the settings 
for even pages (obviously, if you use them, the optional arguments are 
not allowed).  In the arguments of |\sethead|/|\setfoot| and because 
of its one-step mechanism, we must distingish between two groups of 
commands.  The first one are those saved when the marks are sent, with 
information related to sections, and includes:
\begin{itemize}
\item |\thechapter|, |\thesection|\dots{}
\item |\chaptertitle|, |\sectiontitle|\dots{} which print the 
chapter, 
section\dots{} title.
\item |\ifthechapter{<true>}{<false>}|,
  |\ifthesection{<true>}{<false>}|\dots{} which expands to |<true>|
  except if the corresponding title lacks of label or there is
  no title yet after the superior level (for example, between
  |\chapter| and a subsequent |\section|).
\item Any other command or value ``registered'' as ``mark.'' (See below.)
\end{itemize}
The second group are those expanded in every page, and includes:
\begin{itemize}
\item |\thepage|.\footnote{The old |\cs{usepage}| command is no
longer necessary, but it's preserved.} 
\item Any other command not included in the previous items. 
\end{itemize}

\begin{decl}
|\setmarks{<primary>}{<secondary>}|
\end{decl}
Sets which |\...title| commands are to be defined, and when the marks
are updated. For example 
|\setmarks{chapter}{section}|
means that:
\begin{itemize}
\item |\chaptertitle| and |\sectiontitle| are the allowed titles in 
  heads,
\item |\sectiontitle| is reset in |\chapter|,
\item |\ifthechapter| and |\ifthesection| are valid tests, and
\item  Marks are updated in |\chapter| and  |\section|.
\end{itemize}
By default it is 
|\setmarks{chapter}{section}| but |\setmarks{section}{subsection}| in 
\textsf{article} class.

Note that |\markboth| is a command to set the |myheadings| marks and
here does not make sense. In fact, using it can lead to impredictable
results. Anyway, using directly the marking commands is discouraged
(see sec.~\ref{s:starred}) but if you need them, you may use them
as in:
\begin{verbatim}
\chapter*{My Chapter}
\chaptermark{My Chapter}
\end{verbatim}

\subsection{Additional Settings}

\begin{decl}
|\widenhead[<even-left>][<even-right>]{<odd-left>}{<odd-right>}|\\
|\widenhead*{<even-right>/<odd-left>/}{<even-left>/<odd-right>}|
\end{decl}

Makes the head/foot lines wider.  The extra width is asymetrically 
added and hence the two [four] arguments.  Like |\sethead|, the 
starred version reverses the setting for even pages---for example, 
|\widenhead*{0pt}{6pc}| is the same as 
|\widenhead[6pc][0pt]{0pt}{6pc}|.

\subsection{Marks}  

\begin{decl}
|outermarks innermarks topmarks botmarks| \quad (Package options)
\end{decl}

|innermarks| is the default in \LaTeX, with bottom marks in even pages 
and first marks in odd pages.  More convenient is |outermarks|, with 
top marks in even pages and bottom marks in odd pages; it's the more 
usual system in tecnical works and it's described in \textit{The 
\TeX{}book}, p.~259.  Both of them are intended for two side printing; 
|topmarks|/|botmarks| are intended for one side printing with top/bot 
marks in every page (they can be used in two side printing as well).

\begin{decl}
|\bottitlemarks  \toptitlemarks  \firsttitlemarks \nexttoptitlemark|\\
|\outertitlemarks  \innertitlemarks|
\end{decl}

One of the cooler features added to page styles is the posibility of
selecting which marks are used in subsequent macros.
These commands set from which mark get the values of |\thesection|,
|\sectiontitle|, etc. You may use freely in your headers;\,%
\footnote{Not exactly: top marks must not be used in the page where a 
chapter begins, except by overriding the default definition and making 
it of |top| class.} just for fun, the following header shows the 
section label from three of these marks:
\begin{verbatim}
\newpagestyle{funny}{
  \sethead{Top is \toptitlemarks\thesection}
          {First is \firsttitlemarks\thesection}
          {Bot is \bottitlemarks\thesection}}
\end{verbatim}

|\outertitlemarks| is the default value when the |outermarks| package 
option is set, |toptitlemarks| when |topmarks| is set, and so on.  
|\innertitlemarks| is the default value of \LaTeX{} and of this 
package if none of those option is used.  A further set of marks is 
provided with |\nexttoptitlemarks| which provides a bottom mark with 
the values of the top mark of the next page (straight class only); by 
picking some value from it and comparing with the corresponding value 
of the |\bottitlemarks| you may know if a section continues in the
next page. Of course, these commands will be rarely used.

\begin{decl}
|\newtitlemark{<macro-name>}|\\
|\newtitlemark*{<variable-name>}|
\end{decl}

Add a macro or a variable to the list of saved ``marks.'' The macro
must lack of parameters, and the variable should be in \TeX{}
form (which is the same in lengths but not in counters).

\subsection{A couple of examples}

Because of the way marks are handled, special constructions like this are 
allowed: 
\begin{verbatim}
\newpagestyle{main}[\small\sffamily]{
  \sethead [\textbf{\thepage}] 
           [\textsl{\chaptertitle}]
           [[\toptitlemarks\thesection--\bottitlemarks\thesection]
           {\toptitlemarks\thesection--\bottitlemarks\thesection]} 
           {\textsl{\sectiontitle}}
           {\textbf{\thepage}}}
\end{verbatim}
As you can see, the range of sections in a page |\thesection| is
printed in both left and right heads.
Of course, this example should be fine tuned to collapse the
ranges if there is a single section in a page, but it gives
a hint of how gettting stunning headers. 

In this document, the following styles are used:
\begin{verbatim}
\widenhead{2.1pc}{0pc}
\renewpagestyle{plain}[\small\sffamily\slshape]{
  \footrule 
  \setfoot{}{\thepage}{}}
\newpagestyle{myps}[\small\sffamily\slshape]{
  \headrule
  \sethead{Titlesec}{\sectiontitle}{\thepage}}
\end{verbatim}

The following definitions provide page styles similar to
those of Lamport's \LaTeX\ book:
\begin{verbatim}
\newlength{\headind}
\setlength{\headind}{\marginparsep}
\addtolength{\headind}{\marginparwidth}
\widenhead*{0pt}{\headind}  % symmetrically
\renewpagestyle{plain}{}
\newpagestyle{latex}[\bfseries]{
  \headrule
  \sethead[\thepage][][\chaptertitle]
          {\thesection\ \sectiontitle}{}{\thepage}}
\end{verbatim}

\section{Final comments}
%~~~~~~~~~~~~~~~~~~~~~

\begin{itemize}
\item A last minute change ---but of course!---
introduced a bug in version 2.0 which added unwanted
space before |\titleline|. The manual suggested
\begin{verbatim}
\titleline{\hrulefill}%
\vspace{1pt}%
\titleline{\hrulefill}%
\end{verbatim}
as a way to insert to rules spaced by 1 pt, but in fact the space was 
a lot larger.  That was fixed in version 2.1 and hence there is a 
backward uncompatibility.  As a solution, I strongly recommend to 
modify the commands to readjust the spacing, but if for some reason 
the files have to be preserved in the current state, you can create a 
style file with the following code:
\begin{verbatim}
\def\ttl@line[#1]#2{%
  \par\hrule height \z@
  \nobreak
  \begingroup
    \parindent\z@
    \leftskip\z@
    \rightskip\z@
    \makebox[\hsize][#1]{\ttl@makeline{#2}}%
    \par
  \endgroup
  \hrule height \z@
  \nobreak}
\end{verbatim}
and then add an |\usepackage| loading it. Don't use
that in new files.

\item Only a |\footnote| command is allowed in titles, but it
will work. However, the footnote mark is not removed from
toc entries or running headings; for that use
\begin{verbatim}
\usepackage[stable]{footmisc}
\end{verbatim}

\item The page styles has been reimplemented in full in version 2.3.  
Most of previous definition will work with the current code, even if 
many things have changed.  In particular, headers using just |\the...| 
and |\...title| commands, besides |\usepage| and formatting commands 
still work.  Now, pagestyles should be loaded explicitly with the 
|pagestyles| option, but if it is not given and the three basic 
commands are used, the page styles macros are loaded with a warning.  
The new code overcomes the limitations of previous releases, fixes 
some bugs (the uncompatibility between top marks and floats, for 
example), and adds new features.
\end{itemize}

\section{Contents: The \textsf{titletoc} package}
% ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This package is a companion to the \textsf{titlesec} package and it 
handles
toc entries. However, it's an independent package and you can use
it alone. The philosophy is similar to that of \textsf{titlesec}---instead
of hooking the commands as defined by standard \LaTeX{} and classes,
there are new commands which you can format the toc entries with
in a generic way. That means that you have to learn just
two new basic command and a couple of tools, no more, and that you have access 
to
new features. Paragraph format
and fonts are set with commands like |\\|, 
|\makebox|,
|\large|, |\itshape|, and so on, and entries are not shaped in any
fashion because they are pretty free form.

The behaviour of entries
defined with \textsf{titletoc} are different at some points
to that created with the standard commands. In particular:
\begin{itemize}
\item Pages are never broken between entries if the first one is
of an higher level than the second one as, for instance, between
a section and a subsection. If both of them are of the same
level, the break is allowed, and if the first is lower than
the second, it's considered a good place for a page break.

\item The symbols in the leaders are not centered but flushed
right. That is usually more convenient.
\end{itemize}

I would like to note
that no attempt to handle tocs can be complete because the standard
\LaTeX{} commands write directly some formatting commands which
cannot be removed. This is particularly important in lists of
figures and tables, and in the |\part| command.\footnote{But
some of these issues are fixed by \textsf{titlesec}.}

\subsection{A ten-minute guide to \textsf{titletoc}}

Toc entries are treated as rectangular areas where the text
and probably a filler will be written. Let's draw such an
area (of course, the lines themselves are not printed):\footnote{%
I regret that the manual is so poorly formatted at the current
stage. However, writting English text is for me a very hard
task and the documentation takes me a lot; I think that
the package availability is more important
that a fine layout. In next releases I will improve the
documentation.}
\begin{verbatim}
       +------------------------------------+
       |                                    |
       |                                    |
       +------------------------------------+
-left--                                      --right-
\end{verbatim}

The space between the left page margin and the left edge of
the area will be named |<left>|; similarly we have |<right>|.
You are allowed to modify the beginning of the first line and
the ending of the last line. For example by ``taking up'' both
places with |\hspace*{2pc}| the area becomes:
\begin{verbatim}
           +--------------------------------+
        ___|                             ___|
       |                                |
       +--------------------------------+
-left--                                      --right-
\end{verbatim}
And by ``clearing'' space in both places with |\hspace*{-2pc}|
the area becomes:
\begin{verbatim}
   +----------------------------------------+
   |___                                     |___
       |                                        |
       +----------------------------------------+
-left--                                      --right-
\end{verbatim}

If you have seen tocs, the latter should be familiar to you--
the label at the very beginning, the page at the very end:
\begin{verbatim}
    3.2  This is an example showing that toc
         entries fits in that scheme . . . .   4
\end{verbatim}

All you need is to put these elements in the rigth way.  If you have 
reserved the space with |\hspace*{-2pc}|, simply put a box 2 pc 
width 
containing the section label or page so that this space will be
retrieved; this layout is used so often that two commands are provided
which does that for you:
\begin{itemize}
\item |\contentslabel{<length>}| creates the space at the beginning 
and
   prints the section number.
\item |\contentspage| creates a space at the end of length |<right>|
   and prints the page number aligned at the right.
\end{itemize}

Now, we are about to show the two basic commands:

\begin{decl}
|\titlecontents{<section>}[<left>]{<above>}|\\
|              {<before with label>}{<before without label>}|\\
|              {<filler and page>}[<after>]|
\end{decl}

Here:
\begin{itemize}
\item |<section>| is the section name without backslash: |part|,
  |chapter|, |section|, etc. |figure| and |table| are allowed, too.
  (The backlash is ommitted because we are dealing with the concept
   and not the |\part|, |\section|, etc. macros themselves. 
  Furthermore, |figure| and |table| are environments.)

\item |<above>| is code for the global formatting of the entry.
  Vertical material is allowed. At this point the value of
  |\thecontentslabel| (see below) is known which enables you to
  take decisions depending on its value (with the help of
  the \textsf{ifthen} package). You may use the \textsf{titlesec}
  |\filleft|, |\filright|, |\filcenter| and |\fillast| commands. 

\item |<left>| even if bracketted is currently mandatory and it
  sets the left margin from the left page margin.

\item |<before with label>| is in horizontal mode and it will
  be used just before the entry title. As in |\titleformat|, the
  last command can take an argument with the title.

\item |<before without label>| is like the above if there is, well,
  no label.

\item|<filler and page>| is self explanatory. Fillers are created
with the |\titlerule| command which is shared by that package and
\textsf{titlesec}. However, when used in this context its behaviour
changes a little to fit the needs of toc leaders.\footnote{For
\TeX{}perts, the default |\cs{xleaders}| becomes 
|\cs{leaders}|.} You might prefer a |\hspace| instead.

\item And finally |<after>| is code following the entry for, say,
  vertical space.
\end{itemize}

When defining entries, use |\addvspace| to add vertical space, and
|\\*| instead of |\\| for line breaks.

This command can be used in the middle of a document to change
the format of toc/lot/lof entries at any point. The new format is
written to the toc file and hence two runs are necessary to
see the changes.

\begin{decl}
|\contentsmargin{<right>}|
\end{decl}

The value set is used in all of sections. If you are wondering
why, the answer is quite simple: in most of cases the |<right>|
margin will be constant. However, you are allowed to change
it locally in the |<before>| arguments.

The \textsf{book} class formats the section and subsection entries
similarly (but not equally) to:
\begin{verbatim}
\contentsmargin{2.55em}
\titlecontents{section}
              [1.5em]
              {}
              {\contentslabel{2.3em}}
              {\hspace*{-2.3em}}
              {\titlerule*[1pc]{.}\contentspage}
\titlecontents{subsection}
              [3.8em]
              {} % note that 3.8 = 1.5 + 2.3
              {\contentslabel{3.2em}}
              {\hspace*{-3.2em}}
              {\titlerule*[1pc]{.}\contentspage}
\end{verbatim}

Although standard classes use font dependent units (mainly em),
it's recommended using absolute ones (pc, pt, etc.)


\subsection{And more}

Strict tipographical rules state that full text lines shouldn't 
surpass the last dot of the leaders; ideally they should be aligned.  
Surprisingly enough, \TeX{} lacks of a tool for doing that 
automatically---when you fill a box with leading dots, they can be 
centered in the box with the |\cleaders| primitive , ``justified'' 
with |\xleaders| or aligned with the outermost enclosing box with 
|\leaders|, but there is no way to align them with the ``current'' 
margin.

So, the only way to get a fine layout is by hand.  To do that, you can 
use the an optional argument in the |\contentsmargin| command whose 
syntax in full is the following:
\begin{decl}
|\contentsmargin[<correction>]{<right>}|
\end{decl}

The |<correction>| length is added to the |<right>| one in all of lines 
except the last one, where the leaders are placed.  For instance, if 
the text lines are 6 pt longer than the last dot, you should rewrite the 
|\contentsmargin| command to add a  |<correction>| of 6 pt.%
\footnote{Usefully,  some dvi previewers allow to get the coordinates of
the pointed location.}  Unlike the standard \LaTeX{} tools, the 
|\titlerule*| command has been designed so that the |<correction>| 
will have the minimum value possible.

\begin{decl}
|\thecontentslabel  \thecontentspage|
\end{decl}

Contains the text with the label and the page with no additional
formatting, except that written by the class.

\begin{decl}
|\contentslabel[<format>]{<space>}|\\
|\contentspage[<format>]|
\end{decl}

As described above, but with different |<format>|s. The defaults are
just |\thecontentslabel| and |\thecontentspage|, respectively.

\begin{decl}
|\contentspush{<text>}|
\end{decl}

Prints the |<text>| and increases
|<left>| by the width of |<text>|. That is similar to
the hang shape of \textsf{titlesec}.

\begin{decl}
|\titlecontents*{<section>}[<left>]{<above>}|\\
|               {<before with label>}{<before without label>}|\\
|               {<filler and page>}[<separator>]|\\[3pt]
|            |\textit{or ...}|{<filler and page>}[<separator>][<end>]|\\
|            |\textit{or ...}|{<filler and page>}[<begin>][<separator>][<end>]|
\end{decl}

This starred version groups the entries in a single paragraph.
The |<separator>| argument is the separator between entries, and
there is a further optional argument with an ending
punctuation.  For example, this document sets:
\begin{verbatim}
\titlecontents*{subsection}[1.5em]
  {\small}
  {\thecontentslabel. }
  {}
  {, \thecontentspage}
  [.---][.]
\end{verbatim}
whose result is showed in the contents at the very beginning of
this document. Note that the paragraph format must be written in
the |<above>| argument.

Let's explain how the optional arguments works.  First note that the 
number of them determines their meaning---since there should be a 
separator between entries this one is always present; on the other 
hand, |<begin>| is rarely used and hence it has the lowest 
``preference.''  The simplest case is when the titles are of the same 
level; in this case the |<sep>| and the |<end>| parameters (which default to 
empty) are inserted between consecutive entries and at the end of the 
block, respectively.  |<before>| is executed just once at the very 
beginnig of the block and its declarations are local to the whole set 
of entries.

Let's now suppose that we want to group entries of two levels; in this 
case a nesting principle applies.  To fix ideas, we will use section 
and subsection.  When a subsection entry begins after a section one, 
|<before>| is executed and |<begin>| of subsection is 
inserted, which should contain text format only.  Then subsections are 
added inserting separators as explained above.  When a section 
arrives, the ending punctuation of subsection and the separator of 
section is added (except if the block is finished by a subsection, 
where the ending of section is added instead).  We said ``after a 
section'' because a subsection never begins a block.\footnote{In rare 
cases that could be necessary, yet.} The 
subsection entries are nested inside the section ones, and 
declarations are again local.

An example will illustrate that.
\begin{verbatim}
\titlecontents*{section}[0pt]
  {\small\itshape}{}{}
  {}[ \textbullet\ ][.]

\titlecontents*{subsection}[0pt]
  {\upshape}{}{}
  {, \thecontentspage}[ (][. ][)]
\end{verbatim}
produces something similar to:
$$\begin{minipage}{\textwidth}
\small\itshape The first section \textbullet\ The socond one  \textbullet\ 
The third one {\upshape(A subsection in it, 1. Another, 2)} \textbullet\ A
fourth section {\upshape(A subsection in it, 1. Another, 2)}.
\end{minipage}$$

\begin{decl}
|\contentsuse{<name>}{<ext>}|
\end{decl}

Makes \textsf{titletoc} aware of the existence of a contents file
with |<ext>| extension. The package performs
\begin{verbatim}
\contentsuse{figure}{lof}
\contentsuse{table}{lot}
\end{verbatim}

% \begin{decl}
% |\titlelevels{<top>}{<level-list>}|
% \end{decl}
% 
% If you are not using \textsf{titlesec}, this command modifies
% the list of level names. Only necessary if you have been devised
% your own scheme of titles.

\begin{decl}
|leftlabels  rightlabels| \quad (Package options)
\end{decl}

These package options set how the labels are aligned in 
|\contentslabel|.
Default is |rightlabels|. With |leftlabels| the default |<format>| for
|\contentslabel| becomes |\thecontenstlabel\enspace|.

\begin{decl}
|dotinlabels| \quad (Package option)
\end{decl}

With this package option, a dot is added after the label in 
|\contentslabel|.

\subsection{Partial TOC's}

\begin{decl}
|\startcontents[<kind>]|
\end{decl}

At the point where this command is used, a partial toc begins.
The |<kind>| argument allows differents sets of tocs and it
defaults to |default|. These sets may be intermingled, but usually
will be nested. For example, you may want two kinds of partial tocs:
by part and by chapter (besides the full toc, of course). When
a part begins, write |\startcontents[parts]|, and when a chapter
|\startcontents[chapters]|. This way a new toc is started at
each part and chapter.\footnote{\emph{All} partial tocs are
stored in a single file with extension |.ptc|.}

\begin{decl}
|\stopcontents[<kind>]|\\
|\resumecontents[<kind>]|
\end{decl}

Stops the partial toc of |<kind>| kind, which may be resumed.
Since partial contents are stopped by |\startcontents| if necessary,
you won't use those macros very often.

\begin{decl}
|\printcontents[<kind>]{<prefix>}{<top>}{<init-code>}|
\end{decl}

Print the current partial toc of |<kind>| kind. The format
of the main toc entries are used, except if there is a |<prefix>|.
In such a case, the format of |<prefix><level>| is used, provided
it is defined. For example, if prefix is |l| and the format of
|lsection| is defined, then this definition will be used; otherwise,
the format is that of |section|. The |<top>| paremeter sets the
top level of the tocs---for a part toc it would be |0| (chapter), for a
chapter toc |1| (section), and so on. Finally, |<init-code>| is
local code for the current toc; it may be used to change the
|tocdepth| value or the |\contentsmargin|, for instance.

A simple usage might look like (provided you are using 
\textsf{titlesec} as well):
\begin{verbatim}
\titleformat{\chapter}[display]
  {...}{...}{...}  % Your definitions come here
  [\vspace*{4pc}%
   \startcontents
   \printcontents{l}{1}{\setcounter{tocdepth}{2}}]
\end{verbatim}
The included entries are those in the level from 1 to 2 inclusive.

\subsection{Examples}

\begin{verbatim}
\titlecontents{chapter}
              [0pt]
              {\addvspace{1pc}%
               \itshape}%
              {\contentsmargin{0pt}%
               \bfseries
               \makebox[0pt][r]{\huge\thecontentslabel\enspace}%
               \large}
              {\contentsmargin{0pt}%
               \large}
              {\quad\thepage}
              [\addvspace{.5pc}]
\end{verbatim}

The chapter number is out at the edge of the page margin, in a font
larger than the font of the title. If the chapter lacks of number
(because, say, it is the preface or the bibliography) it is not
boldfaced. The page number follows the title without fillers, but
after an em-space.

\begin{verbatim}
\titlecontents{chapter}
              [3pc]
              {\addvspace{1.5pc}%
               \filcenter}
              {CHAPTER \thecontentslabel\\*[.2pc]%
               \huge}
              {\huge}
              {}  % That is, without page number
              [\addvspace{.5pc}]
\end{verbatim}
              
The chapter title is centered with the chapter label on top
of it. There is no page number.

\subsection{Inserting a figure in the contents}

The |\addtocontents| command is still available and you may use
it to perform special operation, like inserting a figure just before
or after of an entry. Sadly, fragile
arguments are not allowed and writing complex code could be a mess.
The trick is to define a command to perform the required operations
which in turn is written with |\protect|.

Let's suppose that we want to insert a figure before an entry.
\begin{verbatim}
\newcommand{\figureintoc}[1]{
  \begin{figure}
    \includegraphics{#1}%
  \end{figure}}
\end{verbatim}
makes the dirty work.

In the place where a figure is inserted write:
\begin{verbatim}
\addtocontents{\protect\figureintoc{myfig}}
\end{verbatim}

\subsection{Marking entries with asteriscs}

Let's now resume a problem explained in relation with
\textsf{titlesec}: marking sections with asteriscs to
denote an ``advanced topic'' unless that the star should
be printed in the toc as well. Here is the code:
\begin{verbatim}
\newcommand{\secmark}{}
\newcommand{\marktotoc}[1]{\renewcommand{\secmark}{#1}}
\newenvironment{advanced}
  {\renewcommand{\secmark}{*}%
   \addtocontents{toc}{\protect\marktotoc{*}}}
  {\addtocontents{toc}{\protect\marktotoc{}}}
\titleformat{\section}
  {..}
  {\thesection\secmark}{..}{..}
\titlecontents{section}[..]{..}
  {\contentslabel[\thecontentslabel\secmark]{1.5pc}}{..}{..}
\end{verbatim}

\section{The \textsf{titlesec} philosophy}

Once you have read the documentation it should be clear that this
is not a package for the casual user who likes the standard
layout and wants to make simple changes. This is a tool for the
serious typographer that has a clear idea of what layout wants
and don't have the skill to get it. No attempt is made to improve
your taste in section formatting.

\section{Appendix}

The following examples will be illustrative. In this part, the
|\parskip| is 0 pt, and the ragged right has been canceled out.

\begingroup

\setlength{\rightskip}{0pt}
\addtocontents{toc}{\protect\setcounter{tocdepth}{-1}\ignorespaces}
\setlength{\parskip}{0pt}

\examplesep

\titleformat{\section}[block]
  {\normalfont\bfseries\filcenter}{\fbox{\itshape\thesection}}{1em}{}

\section[Appendix]{This is an 
example of the section command defined below and, what's more, this 
is an example of the section command defined below}

\begin{verbatim}
\titleformat{\section}[block]
  {\normalfont\bfseries\filcenter}{\fbox{\itshape\thesection}}{1em}{}
\end{verbatim}

\examplesep

\titleformat{\section}[frame]
  {\normalfont}
  {\filright
   \footnotesize
   \enspace SECTION \thesection\enspace}
  {8pt}
  {\Large\bfseries\filcenter}

\section[Appendix]{A framed title}

\begin{verbatim}
\titleformat{\section}[frame]
  {\normalfont}
  {\filright
   \footnotesize
   \enspace SECTION \thesection\enspace}
  {8pt}
  {\Large\bfseries\filcenter}
\end{verbatim}

\examplesep

\titleformat{\section}
  {\titlerule
   \vspace{.8ex}%
   \normalfont\itshape}
  {\thesection.}{.5em}{}

\section[Appendix]{A Ruled Title}

\begin{verbatim}
\titleformat{\section}
  {\titlerule
   \vspace{.8ex}%
   \normalfont\itshape}
  {\thesection.}{.5em}{}
\end{verbatim}

\examplesep

\titleformat{\section}[block]
  {\normalfont\sffamily}
  {\thesection}{.5em}{\titlerule\\[.8ex]\bfseries}
  
\section[Appendix]{Another Ruled Title}

\begin{verbatim}
\titleformat{\section}[block]
  {\normalfont\sffamily}
  {\thesection}{.5em}{\titlerule\\[.8ex]\bfseries}
\end{verbatim}

\examplesep

\titleformat{\section}[block]
  {\filcenter\large
   \addtolength{\titlewidth}{2pc}%
   \titleline*[c]{\titlerule*[.6pc]{\tiny\textbullet}}%
   \addvspace{6pt}%
   \normalfont\sffamily}
  {\thesection}{1em}{}
\titlespacing{\section}
  {5pc}{*2}{*2}[5pc]

\section[Appendix]{The length of the ``rule'' above
  is that of the longest line in this title increased by
  two picas}

\leavevmode

\section[Appendix]{This one is shorter}

\begin{verbatim}
\titleformat{\section}[block]
  {\filcenter\large
   \addtolength{\titlewidth}{2pc}%
   \titleline*[c]{\titlerule*[.6pc]{\tiny\textbullet}}%
   \addvspace{6pt}%
   \normalfont\sffamily}
  {\thesection}{1em}{}
\titlespacing{\section}
  {5pc}{*2}{*2}[5pc]
\end{verbatim}

\examplesep

\titleformat{\section}[display]
  {\normalfont\fillast}
  {\scshape section \oldstylenums{\thesection}}
  {1ex minus .1ex}
  {\small}
\titlespacing{\section}
  {3pc}{*3}{*2}[3pc]

\section[Appendix]{This is an example of the section
command defined below
and, what's more, this is 
an example of the section command defined below. Let us repeat it.
This is an example of the section command defined below
and, what's more, this is 
an example of the section command defined below}

\begin{verbatim}
\titleformat{\section}[display]
  {\normalfont\fillast}
  {\scshape section \oldstylenums{\thesection}}
  {1ex minus .1ex}
  {\small}
\titlespacing{\section}
  {3pc}{*3}{*2}[3pc]
\end{verbatim}

\examplesep

\titleformat{\section}[runin]
  {\normalfont\scshape}
  {}{0pt}{}
\titlespacing{\section}
  {\parindent}{*2}{\wordsep}
  
\section*{This part is the title itself}
and this part is the section body\ldots

\begin{verbatim}
\titleformat{\section}[runin]
  {\normalfont\scshape}
  {}{0pt}{}
\titlespacing{\section}
  {\parindent}{*2}{\wordsep}
\end{verbatim}

\examplesep

\titleformat{\section}[wrap]
  {\normalfont\fontseries{b}\selectfont\filright}
  {\thesection.}{.5em}{}
\titlespacing{\section}
  {12pc}{1.5ex plus .1ex minus .2ex}{1pc}

\section[Appendix]{A Simple Example of the
  ``wrap'' Section Shape}

Which is followed by some text to show the result.  Which is followed 
by some text to show the result.  Which is followed by some text to 
show the result.  Which is followed by some text to show the result.  
Which is followed by some text to show the result.  Which is followed 
by some text to show the result.  Which is followed 
by some text to show the result.

\section[Appendix]{And another}

Note how the text wraps the title and the space reserved to it is
readjusted automatically. And that is followed by some text to 
show the result.  Which is followed by some text to show the result.

\begin{verbatim}
\titleformat{\section}[wrap]
  {\normalfont\fontseries{b}\selectfont\filright}
  {\thesection.}{.5em}{}
\titlespacing{\section}
  {12pc}{1.5ex plus .1ex minus .2ex}{1pc}
\end{verbatim}

\examplesep

\titleformat{\section}[runin]
  {\normalfont\bfseries}
  {\S\ \thesection.}{.5em}{}[.---]
\titlespacing{\section}
  {\parindent}{1.5ex plus .1ex minus .2ex}{0pt}

\section[Appendix]{Old-fashioned runin title}

Of course, you would prefer just a dot after the title. In
this case the optional argument should be |[.]| and the space
after a sensible value (1em, for example).

\begin{verbatim}
\titleformat{\section}[runin]
  {\normalfont\bfseries}
  {\S\ \thesection.}{.5em}{}[.---]
\titlespacing{\section}
  {\parindent}{1.5ex plus .1ex minus .2ex}{0pt}
\end{verbatim}

\examplesep

\titleformat{\section}[leftmargin]
  {\normalfont
   \titlerule*[.6em]{\bfseries .}%
   \vspace{6pt}%
   \sffamily\bfseries\filleft}
  {\thesection}{.5em}{}
\titlespacing{\section}
  {4pc}{1.5pc plus .1ex minus .2ex}{1pc}

\section*{Example of margin section}

Which is followed by some text to show the result.
But don't stop reading, because the following example illustrates how
to take advantage of other packages. The last command in the last
argument can take an argument, which is the title with no
aditional command inside it. We just give the code, but you
may try it by yourself. Thus, with the \textsf{soul} package
you may say
\begin{verbatim}
\newcommand{\secformat}[1]{\MakeLowercase{\so{#1}}}
   % \so spaces out letters
\titleformat{\section}[block]
  {\normalfont\scshape\filcenter}
  {\thesection}
  {1em}
  {\secformat}
\end{verbatim}

The margin title above was defined:
\begin{verbatim}
\titleformat{\section}[leftmargin]
  {\normalfont
   \titlerule*[.6em]{\bfseries.}%
   \vspace{6pt}%
   \sffamily\bfseries\filleft}
  {\thesection}{.5em}{}
\titlespacing{\section}
  {4pc}{1.5ex plus .1ex minus .2ex}{1pc}
\end{verbatim}

\examplesep

The following examples are intended for chapters. However, this
document lacks of |\chapter| and are showed using |\sections|
with slight changes.

\titlespacing{\section}{0pt}{*4}{*4}
\titleformat{\section}[display]
  {\normalfont\Large\filcenter\sffamily}
  {\titlerule[1pt]%
   \vspace{1pt}%
   \titlerule
   \vspace{1pc}%
   \LARGE\MakeUppercase{chapter} \thesection}
  {1pc}
  {\titlerule
   \vspace{1pc}%
   \Huge}

\section[Appendix]{The Title}

\begin{verbatim}
\titleformat{\chapter}[display]
  {\normalfont\Large\filcenter\sffamily}
  {\titlerule[1pt]%
   \vspace{1pt}%
   \titlerule
   \vspace{1pc}%
   \LARGE\MakeUppercase{\chaptertitlename} \thechapter}
  {1pc}
  {\titlerule
   \vspace{1pc}%
   \Huge}
\end{verbatim}
   
\examplesep

\def\thesection{\Roman{section}}
\titleformat{\section}[display]
  {\bfseries\Large}
  {\filleft\MakeUppercase{chapter} \Huge\thesection}
  {4ex}
  {\titlerule
   \vspace{2ex}%
   \filright}
  [\vspace{2ex}%
   \titlerule]

\section[Appendix]{The Title}

\begin{verbatim}
\renewcommand{\thechapter}{\Roman{chapter}}
\titleformat{\chapter}[display]
  {\bfseries\Large}
  {\filleft\MakeUppercase{\chaptertitlename} \Huge\thechapter}
  {4ex}
  {\titlerule
   \vspace{2ex}%
   \filright}
  [\vspace{2ex}%
   \titlerule]
\end{verbatim}

\addtocontents{toc}{\protect\setcounter{tocdepth}{2}\ignorespaces}
\setcounter{section}{3}
\endgroup

\bigskip 

\subsection{A full example}

Now an example of a complete title scheme follows. (The page
style commands, namely |\widenhead| and |\(re)newpagestyle|,
are described below, under ``Pages Styles''.)

\begin{verbatim}
\documentclass[twoside]{report}
\usepackage[sf,sl,outermarks]{titlesec}

% \chapter, \subsection...: no additional code

\titleformat{\section}
  {\LARGE\sffamily\slshape}
  {\thesection}{1em}{}
\titlespacing{\section}
  {-6pc}{3.5ex plus .1ex minus .2ex}{1.5ex minus .1ex}

\titleformat{\paragraph}[leftmargin]
  {\sffamily\slshape\filright}
  {}{}{}
\titlespacing{\paragraph}
  {5pc}{1.5ex minus .1 ex}{1pc}

% 5+1=6, ie, the negative left margin in section

\widenhead{6pc}{0pc}
  
\renewpagestyle{plain}{}

\newpagestyle{special}[\small\sffamily]{
   \headrule
   \sethead[\usepage][\textsl{\chaptertitle}][]
           {}{\textsl{\chaptertitle}}{\usepage}}
               
\newpagestyle{main}[\small\sffamily]{
   \headrule
   \sethead[\usepage][\textsl{\thechapter. \chaptertitle}][]
           {}{\textsl{\thesection. \sectiontitle}}{\usepage}}

\pagestyle{special}

\begin{document}

---TOC

\pagestyle{main}

---Body

\pagestyle{special}

---Index
\end{document}
\end{verbatim}

\subsection{Standard Classes}

Now follows, for your records, how sectioning commands of standard 
clases could be defined.
\begin{verbatim}
\titleformat{\chapter}[display]
  {\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}
\titleformat{\section}
  {\normalfont\Large\bfseries}{\thesection}{1em}{}
\titleformat{\subsection}
  {\normalfont\large\bfseries}{\thesubsection}{1em}{}
\titleformat{\subsubsection}
  {\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}
\titleformat{\paragraph}[runin]
  {\normalfont\normalsize\bfseries}{\theparagraph}{1em}{}
\titleformat{\subparagraph}[runin]
  {\normalfont\normalsize\bfseries}{\thesubparagraph}{1em}{}

\titlespacing*{\chapter}      {0pt}{50pt}{40pt}
\titlespacing*{\section}      {0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}
\titlespacing*{\subsection}   {0pt}{3.25ex plus 1ex minus .2ex}{1.5ex plus .2ex}
\titlespacing*{\subsubsection}{0pt}{3.25ex plus 1ex minus .2ex}{1.5ex plus .2ex}
\titlespacing*{\paragraph}    {0pt}{3.25ex plus 1ex minus .2ex}{1em}
\titlespacing*{\subparagraph} {\parindent}{3.25ex plus 1ex minus .2ex}{1em}
\end{verbatim}

\subsection{Chapter Example}

A final example shows how to take advantage of the |picture|
environment for fancy sectioning formats. Even with the simple
tools provided by standard \LaTeX{} you may create impressive
titles but you may devise more elaborated
ones with, for instance, |pspicture| (\textsf{PSTricks}
package) or by including graphics created with the help of external
programs.

\begin{verbatim}
\usepackage[dvips]{color}
\usepackage[rigidchapters]{titlesec}
    
\DeclareFixedFont{\chapterfont}{T1}{phv}{bx}{n}{11cm}

\newcommand{\chapterformat}[1]{%
  \put(0,190){\parbox[t]{300pt}{\Huge\sffamily\filright#1}}}
    
\titlespacing{\chapter}{0pt}{0pt}{210pt}
% Most of titles have some depth. The total space is
% a bit larger than the picture box.

\titleformat{\chapter}[block]
  {\begin{picture}(330,200)}
  {\put(450,80){%
     \makebox(0,0)[rb]{%
       \chapterfont\textcolor[named]{SkyBlue}{\thechapter}}}
   \put(0,230){%
     \makebox(0,0)[lb]{%
       \Huge\sffamily\underline{Chapter \thechapter}}}}
  {0pt}
  {\chapterformat}
  [\end{picture}]
\end{verbatim}

(The exact values to be used depend on the text area,
class, |\unitlength|, paper size, etc.)

\end{document}



