If you want to add / show some custom data like post meta or similar, you can use one of our hooks. An example:
add_filter( 'woocommerce_pdf_catalog_before_product_information_categories', 'show_case_pack_in_pdf', 10, 2); function show_case_pack_in_pdf ($html, $id) { $product = wc_get_product($id); $pid= $product->get_id(); $case_pack = get_post_meta($pid,'case_pack',true); $html = 'Case Pack: ' . $case_pack; return $html; }