What is not a feature accessible through the main scheduling interface?

The option that is not a feature accessible through the main scheduling interface is related to viewing historical billing records. The main scheduling interface is primarily designed to manage and facilitate appointments, ensuring that scheduling tasks such as booking, rescheduling, and communicating appointment details can be performed efficiently. While appointment notes, demographic information, and appointment reminders are all closely tied to the scheduling process, historical billing records typically require access to a different module or section within the system dedicated to billing and financial management. This distinction highlights the separation of functionalities within system modules, emphasizing that billing information is generally accessed separately from the core scheduling operations.