Several options. There is normally a spot with the product ordering information to include it. You can include it on the checkout page, or you can email it. mailto:email@example.com If you email it, please provide a reference to something on your order to make it easier to match your instructions with the order. Oft-times the name on the order account doesn't match your email address. We spend a lot of time on this!
"Product looked exactly like what was shown online, low cost, high quality, excellent customer service. Spoke to someone on the phone immediately when I had questions, then they followed up with email. Products were delivered fast. Thank you! "