Enable infinite scroll on single.php [closed]

Here’s the direction to go, I think:

The WP Infinite Scroll plugin works by identifying your page’s navigation and then, I think, loading the next link found there. So instead modifying the query on single.php, I’m now trying to modify the pagination.

I’ve tried several pagination functions, such as posts_nav_link() and twentytwelve_content_nav( 'nav-below' ), neither of which displays a thing on single.php, and previous_post().

previous_post() displays a link to one additional post, but never more than one additional post is loaded. I don’t understand why infinite scroll works on index.php but not single.php.

Maybe if I can get twentytwelve_content_nav( 'nav-below' ) to work on single.php, all will be well.


I found posts on similar topics, but none of the answers have worked for me so far.

Using loop pagination on single.php