When I use the flow graph editor, the text blurs out if I zoom out beyond a certain point. I have a 4k monitor on Windows 10 using Unity 2017.2
When I zoom in to the point where the font is approximately 12 point, it looks fine, but if I zoom out even slightly (to where it looks like 10 point font), it becomes so blurry that it's difficult to read. There's a certain point where it changes very suddenly from blurry to perfectly clear.
1.0x: Perfect clarity
0.8x: Mostly blurry and text is slightly cut off
0.7x: *very* blurry
0.6x/0.5x: Mostly blurry and Rigidbody 2D text values disappear at 0.6x
0.4x-0.1x: Very blurry, but to be honest, I couldn't read this anyway.
Customer support service by UserEcho