# Document Classes

Valid LaTeX document classes include:

- article
- report
- letter
- book
- slides

Other document classes are often available. See section Overview of LaTeX and Local Guide, for details. They are selected with the following command:

`\documentclass [options] {class}`

All the standard classes (except slides) accept the following options for selecting the typeface size (10 pt is default):

10pt, 11pt, 12pt

All classes accept these options for selecting the paper size (default is letter):

a4paper, a5paper, b5paper, letterpaper, legalpaper, executivepaper

Miscellaneous options:

- landscape -- selects landscape format. Default is portrait.
- titlepage, notitlepage -- selects if there should be a separate title page.
- leqno -- equation number on left side of equations. Default is right side.
- fleqn -- displayed formulas flush left. Default is centred.
- openbib -- use "open" bibliography format.
- draft, final -- mark/do not mark overfull boxes with a rule. Default is final.

These options are not available with the slides class:

- oneside, twoside -- selects one- or twosided layout. Default is oneside, except for the book class.
- openright, openany -- determines if a chapter should start on a right-hand page. Default is openright for book.
- onecolumn, twocolumn -- one or two columns. Defaults to one column.

The slides class offers the option `clock` for printing the time at the bottom of each note.

If you specify more than one option, they must be separated by a comma.

Additional packages are loaded by a

`\usepackage[options]{pkg}`

command. If you specify more than one package, they must be separated by a comma.

Any options given in the `\documentclass` command that are unknown by the selected document class are passed on to the packages loaded with `\usepackage`.

-->LaTeX index