A navigation key integrally formed with a panel in an electronic device comprises an outer key formed to have a resilient restoring force, and a holder for receiving the outer key, the holder integrally mounted on the panel. The method includes providing an in-process multilevel device including at least one device region and at least one contact region. The vessel may be lowered down to the bottom of the body of water with the face facing down. The network server forwards the received status information from the networked luminaire managers to a computer of an owneroperator of the plurality of luminaires andor a third-party user. Sizes of the menu options according to the frequency are set. The rotational gantry includes an X-ray source configured to emit an X-ray beam through a subject, an X-ray detector comprising one or more detector elements that receive incoming X-rays and to convert the incoming X-rays to image signals, and a data acquisition unit that processes the image signals to generate processed image data.