System-Level Command Functions26 Class Series Programmer’s ManualSTX r Select Reflective SensorThis command enables reflective (black mark) sensing for top-of-form detection of rolled butt-cut,and fan-fold or tag stocks with reflective marks on the underside. This Media Sensor will detect aminimum mark of 0.1 inches (2.54 mm) between labels (see the Operator’s Manual for mediarequirements). The end of the black mark determines the top of form. Use the O command toadjust the print position.Syntax: rDefault setting: Edge sensingSTX S Set Feed SpeedThis command controls the output rate of the media when the FEED Key is pressed.Syntax: SnWhere: n - Is a letter value (see Appendix L).STX s Set Single Buffer Mode(Non-Display Models only)This command, available for backward compatibility, instructs the printer to use single bufferoperation. In single buffer mode, the printer will erase and format all fields. This, in turn, decreasesprinter throughput when incrementing, decrementing, or replacement fields are used (see LabelFormatting Commands). See d.Syntax: s