A laser-induced thermal imaging system having a multi-layer construction donor element and a receptor element for the preparation of a metallic digital half tone color proof having an improved shiny metallic appearance. When recording a wobble signal on the record carrier, in order to achieve a better wobble signal-to-noise ratio during writing, the bottom power level is temporarily raised to an intermediate power level during an intermediate period. In the first mode, a control unit supplies drivers with a signal which is a function of input data, to provide the transmitter drives a communication line with an output impedance equal to the parallel effect of all the terminating resistors. Increased thickness material in the cantilever tends to keep the switch flat in its resting position. Based on the drawing data provided by the image superimposing section 36, the map image with the facility marks superimposed thereon is displayed on the screen of the display device 6. This method will eliminate the necessary labor to gather animals to be treated individually.