3. In both cases use the "Download Zip" button on the right.
4. Some boards require special files and/or libraries from the ArduinoAddons directory. Take a look at the dedicated [README](/ArduinoAddons/README.md) for details.
5. Start the arduino IDE.
6. Select Tools -> Board -> Arduino Mega 2560 or your microcontroller
7. Select the correct serial port in Tools ->Serial Port
8. Open Marlin.pde or .ino
9. Click the Verify/Compile button
10. Click the Upload button. If all goes well the firmware is uploading