The second technique is the single pixel hack invented by Dave Siegel. Thus far I have discussed two layout strategies that increase the readability, aesthetics, and semantic organization of an HTML page. The third, which takes its name from the process of placing strips of lead between lines of text in early typesetting processes, is perhaps the most difficult in terms of practicality. Carefully selected leading increases the readability of a given page by allocating space between lines, paragraphs, and related text blocks, allowing the reader to establish a rhythm punctuated by visible pauses. Because online reading is more tiring and difficult than the hardcopy variety, these visual pauses are helpful, even necessary.
Most browsers perform a primitive leading function by placing an extra space between paragraphs.
For some, however, the default leading behavior of Netscape and other browsers is not enough. Many people, especially HTML designers who have crossed over from typography, would like to exercise more control over their negative space. Another strategy for increasing the aesthetic impact and semantic organization of any given page is to use drop caps to distinguish large sections. The technique for creating drop caps is quite simple. First, use PhotoShop or some other appropriate tool to fashion a drop cap image.