So would the "ideal" position be having the lens center aligned with the screen center along the vertical axis?
Now, I now that this position is usually not practical due to things (like people's heads) getting in the way, but if that were not an issue, would center lens to center screen, or as close to it as possible, be the ideal?
I framed a 2' high vertical opening in the HT rear wall to the PJ cabinet to give myself some flexibility in vertical position.
I could position the PJ at the very top of the opening, or lower down if that is better. My PJ will be in a cabinet behind the rear wall of the HT, so there won't be an issue of people accidentally hitting their heads against it. I just have to clear the height of people's heads when seated in the second (raised) row.
If the PJ opening I have framed is still higher than the seated height of people in the raised 2nd row, should I try to position my PJ as low as possible in my PJ cabinet?
BTW, I framed the PJ opening to be centered horizontally with respect to the screen, so I should not have to use the horizontal shift at all.