Enable Hidden Administration Feature in WordPress

This simple code adds a link called “All Settings” in the WordPress admin menu. When clicked, it takes users directly to the main settings page of WordPress, where they can adjust various site settings.

function ts_all_settings_link() {
    add_options_page(__('All Settings'), __('All Settings'), 'administrator', 'options.php');
}
add_action('admin_menu', 'ts_all_settings_link');