The letter-spacing value of normal overrides an inherited value. A relative letter-spacing value, like em or ex, rather than an absolute value. For more, see our section on length values . Detailed browser support information for this feature can be found in the full version of the Westciv CSS Guide , or in our CSS Browser Support Table . What it does Traditionally in typography, control over the space between words, what is known as track , has been an important element in page design.
Loose tracking tends to cause pages to river , reducing legibility.
Rivering is the phenomenon of white space forming vertical columns down a page. This tends to draw the reader's eye down the page, rather than across it. Tight tacking, on the other hand impairs legibility as readers strain to make out words as a whole. We tend to read words as units in themselves, rather than as strings of characters. Tight tracking makes it more difficult to do this.