Thanks for you support BachN4th! k_b has a good point, if you don’t work with large scores, it’s definitely better on your neck to have the windows side by side 
I’m mostly into full orchestral scores myself, so I always strive for a maximum of real estate, so that I can view the whole score, top to bottom, without scrolling or zooming. I’m including a shot of my monitor setup. All monitors is at native resolution, so it makes it easy to compare the relative size. No.1 is a 4K, no.2 is a “2K” (1440 x 2560) and 3 and 4 are FHD.
Yes, I’m a Cubase user, but I must admit I have never explored all its features. It’s extremely deep and user configurable, and I think the window handling isn’t the most intuitive part of it, but again, I think you will be happiest with the highest possible number of pixels…
