A security management software is executed in print control device connectable via a network to an information processing device that sends an instruction and data thereto. An instrument housing which includes a magnetometer is secured to the directional drilling tool. Each amplifier may have its own feedback loop providing the same gain transfer function to align transitions of the multiple amplified signals. The method preferably comprises surveying the display site to identify important light sources and objects and to gather a reflection map which are both used to create the final displayed image. Each of the leg panels has a first section and a second section.