Order Printer
Install Shopify Order Printer from the Shopify App Store.
You can use the Order Printer app to print custom invoices, packing slips, receipts, labels, and other documents for your orders. The app pulls order data directly from your Shopify admin and formats it into printable documents.
You can customize Order Printer templates using HTML, CSS, and Liquid code. This lets you control the layout, styling, and information that appears on your documents. Shopify Support can assist with minor customizations, but larger customizations need to be done by an experienced third-party designer.
If you use Shopify POS, then you can print invoices directly from your POS device when you have a standard printer connected.