Hey everyone i have recently watched a video by Captain Joe explaining the two white and one red spheres in the cockpit. CORRECT COCKPIT SEAT POSITION! Eye-Position-Indicator explained by "CAPTAIN" Joe - YouTube
These balls indicate if you’re in the correct position in the cockpit ( if the white ball is covered by the red)
In my flight i got bored amd noticed this
The screens in IF don’t have a function yet. These “balls” are there to have the best/optimum sight of the screens/cockpit/instruments and the outside. So it is not necessary. At least not yet.