Since you are using a theme your choices are limited - change the theme
which will affect every link in the website, or apply some CSS and a few
design changes.
Open the page in FrontPage and change to Code or HTML View.
Find the tag
<!--webbot bot="Outline" u-url="index.htm" b-aggressive-trimming="TRUE"
b-show-orphans="FALSE" b-manual-recalc="TRUE" i-heading="4" tag="BODY"
-->
Change this to:
<div id="smap">
<!--webbot bot="Outline" u-url="index.htm" b-aggressive-trimming="TRUE"
b-show-orphans="FALSE" b-manual-recalc="TRUE" i-heading="4" tag="BODY"
-->
</div>
Now find the <title> tag near the top of the page.
Change this to:
<title>Site Map</title>
<style type="text/css">
#smap a {
font-family: Arial, Helvetica, sans-serif;
font-size: 80%; /*All links in sitemap will be smaller, including the
heading*/
}
#smap h4 a {font-size: 120%;} /*make the heading large again*/
</style>
Change the 80% to whatever you need the size to be - 100% is the size
now (which I think is OK).
These changes will only affect the links in the sitemap itself.