There are several billing options that make possible to create invoices automatically or manually, as needed. Features such as Mass Allocation and Automatic Billing can make a difference during an operation. However, for items that need to be manually invoiced, the user can do so under the Order Entry tab. Use the keyboard shortcut Ctrl+o to create a new order anywhere in the system.
The system displays a message once you select a customer who has prebooks pending to be billed. For more information read Prebooks in Units pending Billing.