Templates page.htm

I just updated to V7.1 and love the page.htm templates view/edit

But how can i add a page2.htm, and use it for at specific page.

I could not find any info of this in the manual or here at the board.
the only thing i found was and old trick with $templatefile = "page2.htm";
So i added page2.html to the templates folder

And played around with $templatefile = "page2.htm";

But with no luck <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=22491&image=1&table=forumtopics' class='bbc_emoticon' alt=':(' />