How to calibrate label paper?

Tutorial video: 

Calibrating the Label paper:

1. Turn on the printer.
2. Load at least 4 consecutive sheets of paper into the printer.
3. Once the paper stops moving, press and hold the FEED button (indicated by the red/blue light) and release it when you hear a "beep" sound.
   
4. The printer will then automatically calibrate the label size by moving back and forth, and the process will complete once it stops.