Install GMVify Order Editing from the Shopify App Store and open it from your admin.
In Settings, choose what customers can change (address, items and quantities, personalization, cancelling) and how long each stays open.
Follow the setup guide on the app’s home page to add the edit button to customer accounts and the thank-you page. No code is needed.
Place a test order, open it from the customer account and change something. The change appears on the order and in the app’s edit log.
Still stuck?
Open the app in your Shopify admin, go to Help and click Chat with us, or email [email protected] with your store’s myshopify.com address.