How to Add Featured Images to your WordPress Theme

If your WordPress dashboard is not displaying the Featured Image interface when adding or editing a post, your theme might not support the Featured Image function.

To add the Featured Image function, you can edit your theme’s functions.php file and add the following line:

add_theme_support( 'post-thumbnails' );

For more information on the WordPress Featured Image function, see Featured Images & Post Thumbnails on the WordPress.org website.