A recordable optical recording medium, particularly a recordable high-density optical recording medium is disclosed. The system further maintains a management user interface on an electronic display screen of the administration console. The source data is processed so as to display at least a portion of the input image on a display device. A protrusion extends from the frame which overlays the space defined between the frame and the jamb. The radially expandable pilot member is selectively moveable between a contracted position and an expanded position relative to the longitudinal axis. The area of the round cross section of the shank substantially corresponds to the sum of the cross sectional areas of the two legs of the intermediate section, whereby the heald body has a substantially constant cross-sectional area along its length.