A patient support apparatus includes a patient support surface to support a patient. The patient support surface has at least one air bladder that is inflated and/or deflated to achieve a turn assist function and/or a therapy function of the patient support surface. A graphical user interface (GUI) is configured to receive user inputs from a caregiver to initiate the turn assist or therapy functions. The patient support apparatus has control circuitry coupled to the GUI. The GUI is controlled by the control circuitry to display information indicating that the patient is improperly positioned on the patient support surface for either the turn assist function or the therapy function. Alternatively or additionally, the control circuitry indicates that the patient is improperly positioned for raising a head section of a bed frame.