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Auto display

Since YARPP 1.5, you can just put the yet-another-related-posts-plugin directory in your /wp-content/plugins/ directory, activate the plugin, and you're set! You'll see related posts in single entry (permalink) pages. If all your pages say "no related posts," see the FAQ.

Manual installation

If you would like to put the related posts display in another part of your theme, or display them in pages other than single entry pages, turn off "auto display" in the YARPP Options, then drop related_posts(), related_pages(), or related_entries() (see below) in your WP loop. Change any options in the Related Posts (YARPP) Options pane in Admin > Plugins. See Examples in Other Notes for sample code you can drop into your theme.

There're also related_posts_exist(), related_pages_exist(), and related_entries_exist() functions, which return a boolean as expected.

The "related" functions

By default, related_posts() gives you back posts only, related_pages() gives you pages, and there's related_entries() gives you posts and pages. When the "cross-relate posts and pages" option is checked in the YARPP options panel, related_posts(), related_pages(), and related_entries() will give you exactly the same output.