Admin Orders Screen

By default all the orders are saved to the database. You can disable this feature in Products > Settings > Shopping Cart in the Orders section. Check the checkbox to disable order registration:

Disable Order Registration

All the orders are shown in admin orders menu.

Admin Orders Menu

Admin Orders Screen

You can click the order to see all the details.

Order Details Screen

Customer Details Section

The Customer Details section shows all the checkout fields filled. In the example there are only two fields in the checkout.

You can change all the customer details fields values.

Order Data Section

In the order data column you can edit the payment status. Set it to Pending or Completed.