GE PVM9179DF1BB Owner's Manual page 8

About the features of your oven.
Throughout this manual, features and appearance may vary from your model.
Features of the Oven
Door Handle.
Door Latches.
Window with Metal Shie/d. Screen allows
cooking to be viewed while keeping microwaves
confined in the oven.
Control Panel and Selector Dial
Removable Turntable. Do not operate the oven
in the microwave mode without the turntable
and turntable support seated and in place.
Removable Turntable Support. Do not operate
the oven in the microwave mode without the
turntable and turntable support seated and in
place.
Shelves. Use with Convection Bake, Convection
Roast or Combination Fast Bake. (Do not use
when microwave cooking.)
For best results, use one shelf in the lower
position and leave at least a 1-inch gap between
the cooking dish and the sides of the oven. For
two-level Baking or Fast Baking use both shelves.