G1 - MIG welding mode selection button
G2 - Spot welding - Pressing the button on the torch initiates the process of
welding metal, the process will end automatically after a set time, releasing
the button forces the process to end.
G3 - 2T - Pressing the button on the torch initiates welding of metal and
releasing the button ends the process
G4 - 4T - Pressing the button on the torch initiates the process of welding
metal, releasing the button does not end the process. Pressing and releasing
the button again completes the metal welding process.
G5 - Repeat (the operation of this mode is described in the figure below)