How do I add custom "supports" attributes to a custom post type? I've created a post type, and its all good, but I need to add a custom attribute to the supports array. This doesn't seem to be working for me.
//ADDS SUPPORT FOR MODIFYING ARCHIVE VIEW FORMAT
add_action('init', 'mai_support_archive', 999);
function mai_support_archive()
{
add_post_type_support('boat', 'mai-archive-settings');
}