The rules differ somewhat depending whether you are in text mode, math mode, or the tabbing environment

Text mode

The following accents may be placed on letters. Although "o" is used in most of the example, the accents may be placed on any letter. Accents may even be placed above a "missing" letter; for example, \~{} produces a tilde over a blank space.

The following commands may be used only in paragraph or LR mode.

Note that the letters "i" and "j" require special treatment when they are given accents because it is often desirable to replace the dot with the accent. For this purpose, the commands \i and \j can be used to produce dotless letters.

For example,

Math mode

Several of the above and some similar accents can also be produced in math mode. The following commands may be used only in math mode.

Tabbing environment

Some of the accent marks used in running text have other uses in the tabbing environment. In that case they can be created with the following command:
Related topics: Back to the LaTeX Table of Contents
Revised: Sheldon Green, 20 Oct 1995.