Comment on WordPress Hacks by SEO Dave.

WordPress Hacks All the font sizes are located in the style.css file.

For example

.header_site_desc h1, .header_site_desc span {
margin: 0px;
padding: 0px;
width: 640px;
font-size: 1.2em;
color: #FFFFFF;
font-weight: normal;

Controls the home page link in the header area, if you change

font-size: 1.2em;

It will change the font size.

Not sure if centering would work particularly well. You could try changing the padding to make it look centered.

Try adding

padding-left: 20px;

Below font-weight: normal; and see what it looks like. Increase/decrease the number to put it where you want it.