Calibration (2 group head la marzocco)

press and hold the swirl button on the first group (far left) lights will blink. press the button you wish to program, once you reach the amount of espresso you wish to give press the button again then it will be stored into memori do this to the rest of the buttons on the first key pad. after you finished the first group the computer will automatically transfer the same programing to the second group. Good uck