收据管理
收据是客户购买的内容以及他们支付的金额的证明。
您可以通过多种方式向客户提供他们的收据，例如在收据打印机上打印收据、通过电子邮件向客户发送收据或通过短信发送给他们。
如果您有多台收据打印机，则可以为您的每一台 POS 设备选择默认打印机。
此外，您还可以通过添加商店地点、客户信息或任何订单备注来自定义收据的外观。
默认收据打印机
连接打印机时，系统会将该打印机自动设置为收据打印的默认打印机。如果默认打印机不可用，则您将无法打印收据。如果您有多台打印机，则可以从 Shopify POS 更改默认打印机。
步骤：
在 Shopify POS 应用中，点击
≡，然后点击设置。在硬件部分下，点击管理已连接的硬件。
在收据打印机下，点击您想设置为默认打印机的打印机。
点击设置为默认收据打印机。
打印测试收据
设置默认收据打印机后，将打印一份简要的诊断报告。在此之后，您应该打印一份测试收据以确认一切正常。
步骤：
在 Shopify POS 应用中，点击
≡，然后点击设置。在硬件部分下，点击管理已连接的硬件。
在收据打印机下，点击您设置为默认打印机的打印机。
点击测试收据打印机。
Shopify商户官网原文详情：
Receipt management
Receipts are the customer's proof of what they bought and how much they paid.
You can give your customers their receipt in a number of ways, such as printing it on your receipt printer, emailing it to them, or texting it to them.
If you have multiple receipt printers, then you can choose which one is the default printer for each of your POS devices.
You can also customize the appearance of your receipts by adding your store's location, the customer's information, or any order notes.
Default receipt printer
When you connect a printer, it's automatically set as the default printer for receipt printing. If the default printer is unavailable, then you won't be able to print a receipt. If you have more than one printer, then you can change the default printer from Shopify POS.
Steps:
From the Shopify POS app, tap
≡and then tap Settings.Under the Hardware section, tap Manage connected hardware.
Under Receipt printers, tap the printer that you want to set as the default.
Tap Set as default receipt printer.
Print a test receipt
After you've set up your default receipt printer, a brief diagnostic report prints. After this, you should print a test receipt to confirm that everything is working.
Steps:
From the Shopify POS app, tap
≡and then tap Settings.Under the Hardware section, tap Manage connected hardware.
Under Receipt printers, tap the printer that you set as the default.
Tap Test receipt printer.
