
Make It Disappear
I'm going to skip this one, as I can't think of any circumstance under which you'd need it.

Borders
To put a border around it:
<style type="text/css">
.group_entry { border: 1px solid red; }
</style>
[ More Border Styles ]

Background
To set a background color:
<style type="text/css">
.group_entry { background: red; }
</style>
Or a background image:
<style type="text/css">
.group_entry { background: url('http://www.PATH TO YOUR IMAGE.gif'); }
</style>
More on
[ Backgrounds ]

Styling Text
The group_entry table contains both plain text and links. You can style the text, links, and even links in
their hover state all separately:
<style type="text/css">
.group_entry {
color: red;
font-family: "Times New Roman", Times, serif;
}
.group_entry a:link, .group_entry a:visited {
color: orange;
font-size: 8pt;
text-decoration: none;
}
.group_entry a:hover {
color: green;
background: yellow;
font-size: 8pt;
text-decoration: underline overline;
}
</style>
More
[ Text Styles ]

Size
You can change the width of the group_entry table:
<style type="text/css">
.group_entry { width: 400px; }
</style>

Positioning
You can use margins to set a bit more space to the top or bottom, or left or right of the group_entry table
(Nb, the group_entry table is 100% the width of the page by default, so to set a left or right margin for it you
would first have to give it a width).
<style type="text/css">
.group_entry {
width: 400px;
margin-left: 200px;
margin-bottom: 60px;
}
</style>