Question about Tefal ActiFry Genius XL 2in1

The turning ring is there to prevent the food from piling up on the upper edge. (It is therefore also called an overflow ring.) However, it is only necessary for larger portions. To fit the turning ring, place it on the rim of the container, centre it with the indentation
centre it with the indentation facing forward and press it down until you hear a "CLICK".

I hope I was able to help you...

Do you mean the upper deck?
For cooking other foods at the same time, for example meat or fish.
I am very happy with the item, use it a lot and eat healthier.
Greetings.