How do I determine rack position when I roast?

To determine and accommodate all the cooking trays and achieve desired results before heating the oven, it's good practice to stage the oven and place different type of food in the proper rack. For example, vegetables roasted on rack position 2 will benefit from the stronger heat from the bottom heating element while meats cooked on rack position 4 will benefit from the direct heat from the top heating element.

You have to count the rack position from the bottom up.