These commands (MCR, MCR-QUERY and MCR-CAN) can be used to configure and activate the optional Magnetic Card Reader (MCR). The MCR commands will be ignored by printers that are not equipped with a Magnetic Card Reader. The MCR command can be issued in a label file (! 0 200 … PRINT), or in a utilities command session (! UTILITIES … PRINT). Refer to the discussion of the MCR commands in Section 10 (Advanced Utilitiies) of this manual for complete information on using the MCR option.