Two new ways to control your order emails, both on the Pluss plan:

• Custom email templates — Build your own email and choose exactly when it's sent. Pick a trigger and add criteria like order status, shipping method, payment method, customer group, categories, order value, weight, or number of products. When an order matches, your template is sent instead of the standard order-update email.
• Attachments — Add a PDF (up to 1 MB) to your order confirmation or order-update emails, so it's sent along automatically. Reuse a file you've already uploaded with "Choose existing".

Find both under Admin → Email templates.