Hi Mindy! Certain functions have limitations on whether they can be used in the upper, lower, or single oven mode. The Convection Bake function can be used in any of the 3 options. The Convection Roast function can be used in the single or upper oven. The Bake function is for the single or lower oven. The broil function is available in the single or upper oven. ^Jecca