Household appliance for food preparation and methods of operating a domestic appliance

Household appliance for preparing food, comprising a cooking chamber (3), which inside the receiving elements (5 to 8) which are adapted to receive a cooking apparatus and the formation of shelf levels (I to IV) of the cooking apparatus, and (with an optical display device 9) (to indicate the insertion levels I to IV), and a door (4) for closing the cooking space (3), characterized in that the display device (9) comprises light sources (10 to 13) formed in the side of a base body battered (2) of the household appliance (1) door (4) are arranged.