Use CSS. Ideally a LINKed CSS.
Try
www.w3schools.com/css/ for a tutorial.
In the CSS, include one of the following definitions:
body { font-size: 85%; }
or
body { font-size: 0.9em; }
or
body { font-size: x-large; }
Notes: You can set the font-size to be x number of pixels but this is bad
from an accessibility point of view. The above options all allow the user to
resize the text using browser settings. In most browsers, using explicit
pixel sizes prevents this.
Also Mac users often see smaller text than Windows users:
http://db.tidbits.com/getbits.acgi?tbart=05284
hth,
Chris
