While this does rely on inserting an extra element, the advantage is that the SPAN can be placed anywhere in the paragraph and still have the result depicted in Figure 9-21.

P {font-size: 12px; line-height: 1.5;}
SMALL {font-size: 66%;}
BIG {font-size: 200%; line-height: 1em;}
WARNING
Anything this useful has to have a drawback, right? As it happens, Internet Explorer 3.x will treat scaling factors as though they were pixel units. Just try to imagine a paragraph with a line-height of 1.5px . It isn't pretty.
margin-left is one of four properties devoted to setting the margins on each of the four sides of an element box. Their names should come as little surprise.