WordPress.org

Here we go:

1. Upload the subheading folder to the /wp-content/plugins/ directory.
2. Activate the plugin through the 'Plugins' menu in WordPress.
3. Place <?php if (function_exists('the_subheading')) { the_subheading('<p>', '</p>'); } ?> in your template files where you want it to appear, or enable the Automatically append before the content option on the settings page.
4. Add the subheading content using the standard WordPress edit page.

The settings for this plugin are found by navigating to the Plugins menu and selecting SubHeading.

If you are not within the_loop, you can use get_the_subheading($postID); to fetch the value for a particular page or post.