Setting the Line Height
Line height refers to a paragraph's leading, that is, the amount of space between each line in a paragraph. Using a large line height can sometimes make your body text easier to read. A small line height for headers (with more than one line) often makes them look classier.
Figure 10.19. Assuming a default body element of 16 pixels, the font size of the p element will be 87% or about 14 pixels. The line height will be 170% of those 14 pixels, or about 24 pixels.
To set the line height: