[support] Custom print template help..

Hi,

I have a content type that creates a basic invoice.. I now need to create a formatted printable invoice using the data shown on the invoice..

I have installed the print module which created the "printable version" link.. I now need to customise the layout..

This is a non-programmer talking so please be gentle and verbose.. :)

I created a "print--node--invoice.tpl.php" in my theme directory and copied the tpl.php file from the print module directory to get me started..

So far so good..

Now where I have got stuck is putting in the individual fields where I want them.. There is a $content variable used in the example but that just shows everything..

How do I tell the template where I want individual fields?

So for example say I want to output the field_inv_num value?

Thanks..