How to preheat convection oven

Before you bake something, your oven needs to be heated to the proper temperature. While it takes only a few seconds to turn on your oven, it can take several minutes for it to reach the right temperature. The first step to preheating an oven is to turn it on to the temperature you want it to be. In old oven, this involved turning a dial. In modern oven, this involves hitting a few buttons.