Answer:
Choose the Convection Bake Mode on your controller and select a temperature higher than either 500oF or 260oC. Press and hold Convection Bake for 3-4 seconds and "F" or "C" will appear in red in the display. Using your up/down keys, toggle from "F" to "C", or "C" to "F" depending on your choice. If you are not using your product, turn it off by pressing Cancel/Secure.