Here you can set serial port, and how data are sent to it. You can send to serial port data exported via Custom Exports module, or cutting layouts of one plan or multiple selected plans via "File > Export > Send cutting layouts to serial port".
Click on the button to pick serial port and set baud rate and other settings.
A prefix that is added to the beginning of data sent to the serial port. Can include control char sequence, for example #9 (tab).
A suffix that is added to the end of data sent to the serial port. Can include control char sequence, for example #13#10 (line break).
Check if you want to show button on Results tab for quick access. You can send cutting layouts to serial port also via File > Export menu.