Will this plugin work with custom post types? (I have a custom menu set up).

I should also mention that we are running a multisite install and I only want this on the top level site. (Some plugins add tables to every site on the network and I definitely don’t want that :))

https://www.ads-software.com/plugins/custom-menu-driven-prevnext-links/

Step 8 of the usage instructions say “Now comes the tricky part, go to Appearance -> Editor. Here you need to insert “” into one of the php files (which are listed on the far right). Exactly which file you need to edit depends on the particular WordPress theme that you’re using. A good starting point could be going to a file called “single.php”.”

What does ‘Here you need to insert “” into one of the php files’ mean? What is “”? I feel as though there is something important missing here.

https://www.ads-software.com/plugins/custom-menu-driven-prevnext-links/