You can access the patient flow in two ways. From the main screen at the top there is a Patient Flow tab where you can see patients as they change statuses from Checkin to Checkout.
You can also click Patient Flow on the left side of the screen in the task pane to access the Patient Flow Module.
You can right click on each patient and set them to different statuses as they are tracked through the office. Colors change on screen to alert you of time intervals past.