- File > Examples > 11.ArduinoISP > ArduinoISP
- Connect Uno that will be used as "Arduino as ISP" programmer to computer
- Tools > Board > Arduino/Genuino Uno
- Tools > Board > Port > select the port of the Uno
- Sketch > Upload
- Unplug programmer Uno from computer
- Connect programmer Uno to target microcontroller as described at https://www.arduino.cc/en/Tutorial/ArduinoISP.
- Plug programmer Uno into computer
- Tools > Board > select the correct board for your target microcontroller
- Tools > Programmer > Arduino as ISP
- Tools > Burn Bootloader