The invention relates to a nurse messaging system having a rotating cover, which allows the user to move informative indicia plates externally from the frame into a displayed position using a reversible locking system. The messaging sign having a base and a frame, the frame is layered to form slots on an outer surface of the sign and openings on an inner body of the frame. Plates are positioned in the openings and moveable through the slots. Each plate is automatically lockable into a displayed position using a locking member arranged on the frame, and a cover rotatably mounted to the base.