I tried your suggestion by holding it 3 inches below my eyes.
I found myself with my head halfway through the top of the wings - (very interesting feeling staring at AVGAS on the wing!).
I then pressed the menu to go back to seat and it places me exactly where I always am, head touching roof.
It seems to have its own positioning which means if I lower my self to the correct position and then go outside or look at any of the views, as soon as I go back to the seat, I feel like I am sitting on a 6inch cushion.