I\'m reading data from 9 different sensors for my robot and I need to display them all steadily, in the same window so I can compare the values and see if any of the reading
You could try:
Serial.write(13);
Which will provide a carriage return, returning to the start of the line every iteration - which should do what you're chasing? (Especially if everything is fixed width).
If you change baudrate for example back and forth it clears the Serial Monitor window in version 1.5.3 of Arduino IDE for Intel Galileo development