Should I preheat the oven before baking, and how long does it take?

It is recommended to preheat the oven for 5 minutes prior to baking delicate items such as cakes and muffins, and this preheat time should be incorporated into the total baking time. For pizza, the manual recommends preheating at 230°C for 10 to 15 minutes before baking. When using Convection Bake, it is also advised to always check for doneness 10 minutes before the end of the suggested cooking time. (Pages 6, 7)