By default, Genesis displays the page links after the content when using the next page tag in the WordPress editor.
Here’s what the page links look like on a single post:
And here’s the nextpage tag added in the editor in the Edit Post screen:
And here’s what the PHP code in this post enables you to do:
And here’s the code you simply copy from the view raw link and paste at the end of your child themes functions.php file using a code editor.