[support] render()

Hi Folks, I have a node expressed as an associate array: "$node = node_load($nid);" I have some mysteries: First, "print_r($node)" produces the same output as "print_r(render($node))", and I think the reason is that I need to add properties to the $node array to tell render() what I want done. Are my suspicions correct? Second, I seek to display $node as HTML. How do I do this? Chris.