Shopify's Order Printer enables you to quickly set up and print custom packing slips, invoices, labels, and receipts for your orders both individually or in bulk. Customizations to templates are made with HTML, CCS and Liquid. If you don’t have experience with this, Shopify Theme Support can assist with minor customizations. Major customizations will need to be done by a 3P app, designer, or developer. Order Printer app does not support customizing POS printer receipts.