1. make new skin [Print] with
2. Insert in /skin/myskin/single.main.php [Print] link with this code.
echo'<a href="http://' .$_SERVER['HTTP_HOST'] .$_SERVER['REQUEST_URI'] . '?tempskin=print" target="_blank"> <img class="print_icon" src="../../rsc/icons/print_icon.png" alt="print" title="print" /> Printer Friendly Layout </a> '
index.main needs two links to a stylesheet. (they could be the same file)
1. media="screen"
2. media="print"
For updates see http://forums.b2evolution.net/printer-friendly-layout