To get newer functionality, it may be necessary to upgrade the firmware of the printer/cutter.
Before upgrading the firmware, it is advised to make a backup of the configuration of the machine.
See document "Backup DC3-DC4(sx).pdf".
Then reboot the machine: switch the machine off, then power on again.
Download the new firmware "DC3&4 reuse iButton rev 60 no HD.summa2".
Note the location of the downloaded file.
Finally, use Summa Printer Control to send the new firmware to the printer.
See document "Firmware upgrade on DC3 - DC4 - DC4sx.pdf"