Then press feed button and keep it pressed until green LED blinks twice and release it. Printer will Calibrate itself and after that will be ready for printing. Print darkness can be adjusted by lowering print speed or changing darkness. To install as a network printer, connect directly to router using network cable.
Go to Control panel- Add printer Network printer- Choose Printer isn't on a list- type in IP address from the label on printer side- Device type: Print Server-Zebra-GK420t. Install, configure- Add label size, calibrate and you are ready to go. The drivers and manual can be downloaded free from the Zebra website.