Here is an example of what you would add to the child theme functions.php file:
global $meta_boxes;
$meta_boxes[] = array(
'id' => 'page_heading_meta_box',
'title' => __('Page Heading Options', $text_domain),
'pages' => array( 'article' ),
'context' => 'normal',
'fields' => array(
// SHOW PAGE TITLE
array(
'name' => __('Show page title', $text_domain), // File type: checkbox
'id' => "{$prefix}page_title",
'type' => 'checkbox',
'desc' => __('Show the page title at the top of the page.', $text_domain),
'std' => $default_show_page_heading,
),
)
);
– Ed