The template engine for PDF Invoices & Packing Slips is built for flexibility, and includes several action hooks where you can output custom content: Hook Position Arguments wpo_wcpdf_before_document Before all content on the document $document_type, $order wpo_wcpdf_after_document After all content on the document (after the footer) $document_type, $order wpo_wcpdf_after_document_label After the document label (Invoice, Packing … Continue reading PDF template action hooks