Thanks for the answer, this kinda solves my problem. I can finally adjust my seating a little more upwarts (so I can see the nose of the P51D). Your "manual" works just fine, but it does not fix what I bugs me.
I want to sit more in the back of the plane, so I can have a better view on the display - I think gaining more field of view (view) should work fine. You could say that I want to have more field of view than I have at the moment and the minmal FOV ("zooming in") is waaay tooo close. I think as you can see on my posted screenshots, that I can have such a small FOV that I cant literally see every letter on the plane.
But thanks anyway! :)