Mark or Mach? Not too sure. Click on the things If whatever answer you put for the setting is not a valid number then it will reset whatever changes have been made Changing the settings while something is in the microwave will only affect subsequent microwave usage.
Disclaimer: Please do not microwave random items in hope that they will change color, as they are not magic microwaves. @ScratchTheWolf Credit to freesound for all the sounds used Music is Tokyo Daylight from Persona 5 For SDS