theme action hooks and filters?

Hello, we have moved to Newspaper theme from a previous theme that supported action hooks and filters, where we used our functions.php file to modify the page contents. For example, to show custom fields on posts, we used this code in our child theme functions.php:

// add album title, label and article subtitle to posts and pages
function vg_subtitle($posttitle) {
global $post;
$albumtitle = get_post_meta ($post->ID, 'Album Title', true);
$albumlabel = get_post_meta ($post->ID, 'Label', true);
$subtitle = get_post_meta ($post->ID, 'Subtitle', true);
echo $posttitle;
if ($albumtitle) echo '<div id="vg-albumtitle">' . $albumtitle . '</div>';
if ($albumlabel) echo '<div id="vg-albumlabel">' . $albumlabel . '</div>';
if ($subtitle) echo '<div id="vg-subtitle">' . $subtitle . '</div>';
}
add_action('thematic_postheader_posttitle','vg_subtitle');

I am wondering, does Newspaper support action hooks such as this, to display these custom fields? I am wondering where I might find the Newspaper theme equivalent to replace above ‘thematic_postheader_posttitle’ … ? Is there a support doc reference to theme action hooks and filters? Thanks!