I'm connecting my Late 2013 MBP with Iris Pro graphics to a Seiki 39" 4K monitor. Seemingly at random, I get two different types of Settings->Displays screens:
Importantly, Screen 2 lets me choose my favorite resolution - a scaled display with effective 2560x1440 pixels. Screen 1 only lets me choose 1920x1080 at HiDPI, which makes screen elements too large. Alt-clicking 'Scaled' on Screen 1 doesn't help. I do get more choices, but not 2560x1440 HiDPI.
How do I always force Screen 2?