Web Design in a Nutshell, 3rd Edition

Figure 18-19 shows an example of a style sheet rule that adds 8 pixels of extra space between the characters in the first line of text.

    p {letter-spacing: 8px; }

    <p>Nunc a nisl.</p>

Figure 18-19. Letter spacing

The default value normal is equivalent to a numeric setting of zero (0). In other words, whatever value you specify is added to the standard character-spacing text. Negative values are permitted and will cause the characters to overlap.

Note that when specifying relative lengths (such as em, which is based on font size), the calculated size will be passed down to child elements, even if they have a smaller font size than the parent.