[Lynne]

Admin CP > Usergroups > Usergroup Manager > select usergroup to Edit > Username HTML Markup (Specify an opening and closing HTML tag with which to display the names of users in this group. This applies to names that appear on Logged-in Users, Who's Online, Users Browsing Forum, Users Browsing Thread, Posts, Member List etc.)

The first field is the opening tag. The second field is the closing tag. These tags will be inserted around the user's username like this:

[opening tag]username[closing tag]

Some HTML tags you might want to use here include:

<span style="font-weight: bold;">username</span> = username
<span style="font-style: italic;">username</span> = username
<span style="text-decoration: underline;">username</span> = username
<span style="color: red;">username</span> = username
<span style="font: 20px verdana;">username</span> = username

You can also do combinations by using more than one attribute in the style property:

<span style="font: 20px verdana; color: red;">username</span> = username