Hi Koko,
You should be able to add something like this in your template ...
in main.php add this line or similar after the <body>
<div class="print_only"><?php echo $ID?></div>
and then style it appropriately.
in layout.css add .print_only {display:none;}
in print.css nothing is required, it should print in default style,
you can add styles to have it print how you like.
Cheers,
Chris
