I wonder if theme does affect it then? Double checked the code I posted and that is what is working for me. Good to know I should try your if that ever changes! Thanks for posting!

It's not in the theme code, you have to go through settings to find it. Go to Settings -> Shipping and Delivery -> Edit Packing Slip Template. Should be line 97 or thereabouts.

Don’t know if op is still looking for help, but I found this question when I was looking for the answer myself and wanted to post the answer for other people looking for it.I don’t know HTML, and Shopify helpfully suggested I borrow money from them t...