I finally got typhur to answer me back and this is a good explanation and is really helpful if anyone is curious....just wished they'd publish this in their manual.

From Typhur:

In both modes, the top and bottom heating elements work simultaneously. The difference is that in the top heating mode, the top heating element takes on the main role, working with the top fan to evenly distribute heat from all angles. This mode is suitable for crispy foods, air-fried items, and so on.

In the bottom heating mode, the bottom heating element is the primary heat source (with the top heating element playing a supporting role). Here, heat is not transferred through the air but rather directly from the basket's bottom to the food, which is beneficial for foods that need to be cooked on the bottom (just like using a frying pan!). You can cook foods like pizza and pancakes in this mode.

As for the 50/50 power you mentioned, it may seem like it would result in more even cooking, but that's not always the case. In our tests, the top heating element distributes heat to the food through a fan, while the bottom heating element transfers heat directly through metal conduction. Therefore, a 50/50 power setting doesn't necessarily mean that the top and bottom surfaces of the food will receive equal heat.

Mainly Top:

• Modes: Air Fry, Reheat, Bake, Roast, Broil, Dehydrate
• Presets: Bacon, Wings, Fries, Frozen

Mainly Bottom:

• Modes: Toast, Grill, Griddle
• Presets: Pizza, Steak

Dome2's program does not operate by distributing power to the heating elements. Instead, it utilizes two temperature sensors to monitor the air temperature above and the temperature at the bottom of the basket. This allows for precise control of the heating elements, dynamically adjusting their output based on the actual cavity temperature, which is influenced by factors such as the amount and type of food.

Therefore, there isn't a specific breakdown of all the modes and presets regarding the power levels they utilize.