Microwave button = Power level button
power level selected can be removed with cancel button
Microwave Button
Press this button a few times to set the level of microwave cooking.
Microwave cooking
The longest cooking duration for microwave is 95 minutes. You can set the power level pressing the MICROWAVE button repeatedly.
•For example, if you want to cook for 5 minutes with 60% microwave power.
•Press STOP/CANCEL button.
•Press the POWER LEVEL button repeatedly to select the power level
https://manualzz.com/doc/52217050/grundig-gmf1030-manual