I'm looking into putting a border around the entire forum and then filling it with a background colour. However I can't seem to get the border to go where it needs to be, I followed instructions from an old thread here (https://vborg.vbsupport.ru/showthread.php?t=151741&highlight=forum+border). But that sets the border too far away from the forum. See the attachment for what I mean, thanks in advance for any help :).
I use a div with added css to draw the outer border, but doing it with a table the way they are should work the same way: just change the outer table width from 100% to whatever % you currently have for "main table width." Then set "main table width" to 100%, so it fills the outer table.
So if your usual width is 80%, your added code will look like this:
<table border="0" cellpadding="0" cellspacing="0" align="center" width="80%" style="background: #CCCCCC;">
<tr>
<td style="border: 1px solid #CC0000;" valign="top">
Then, under "Sizes and Dimensions," set your "Main Table Width" to 100%.