Sectioning
In the body of your document, sectioning commands provide the means to structure your text into units. These are all optional, but they can greatly assist in structuring your document.
| Sections and Their Depths | ||
|---|---|---|
| Depth in document | Section Command | Depth for \secnumdepth Command |
| -1 | \part (report and book class only) | 1 |
| 0 | \chapter (report and book class only) | 2 |
| 1 | \section | 3 |
| 2 | \subsection | 4 |
| 3 | \subsubsection | 5 |
| 4 | \paragraph | 6 |
| 5 | \subparagraph | 7 |
In each case, the title of the part, chapter, section, etc goes in the curly braces after the command. LaTeX automatically calculates the correct numbering and prints the title in bold. See below for more on how to modify section numbering. Headings automatically get put into the Table of Contents, if you specify one. Because headings get put into the Table of Contents, LaTeX allows you to create a longer heading, for use in the paper, and a shorter heading for use in the Table of Contents, by specifying it within the heading title command:
| Normal heading title command: | \section{Some section title here} |
| With a long heading: | \section[Shorter version]{Full, long heading which would be ugly and cumbersome on the Table of Contents} |
Section Numbering
All document divisions get numbered by default. To get an unnumbered section, which does not go into the Table of Contents, follow the command name with an asterisk before the opening curly brace like this:
\subsection*{shopping list}
| Default Numbering for Sections | ||
|---|---|---|
| Section Type | Numbering | Example |
| Parts | Uppercase Roman Numerals | Part I, Part II |
| Chapters and Sections | Decimal Numbering | 1.1, 2, 2.5 |
| Appendixes | Uppercase Letters | A, B, C |
You can change the depth to which section numbering occurs and you can turn it off selectively. To change the depth of the sections numbered, use the depths from the chart above on "Sections and Their Depths" with the command:
\setcounter{secnumdepth}{3}
This command tells LaTeX to set the counter for the section depth to 3, which would stop all numbering after parts, chapters, and sections, so no subsections, paragraphs, or subparagraphs would be numbered. A related counting feature is tocdepth, which specifies the depth to make the Table of Contents. Its command is:
\setcounter{tocdepth}{level}
Page Numbering and Page Style
\pagenumbering
\pagenumbering{num_style}
Specifies the style of page numbers. Possible values of `num_style’ are:
| arabic | Arabic numerals |
| roman | Lowercase Roman numerals |
| Roman | Uppercase Roman numerals |
| alph | Lowercase letters |
| Alph | Uppercase letters |
\pagestyle
\pagestyle{option}
The `\pagestyle’ command changes the style from the current page on throughout the remainder of your document.
The valid options for the \pagestyle command are:
| plain | Just a plain page number. |
| empty | Produces empty heads and feet – no page numbers. |
| headings | Puts running headings on each page. The document style specifies what goes in the headings. |
| myheadings | You specify what is to go in the heading with the \markboth or the \markright commands. |
Shi Cheng 