Why my editor became blurry ?

LOL I just had this problem yesterday.

By doing a SEARCH you would have found the answer.

But, the way I fixed it, close Unity, go to your graphics card properties and change the settings to in between performance and quality.

(If it is already like that, then I suppose go more towards quality.)

Hope that helps!

I got mine back to crisp shape by going to my res. settings and scaling the display to full screen.

basically i think what had happened is i was trying to get get my Nvidia control panel to open ( still can't ) and i changed something by mistake.

mine was set on the aspect ratio, and if anyone else has this problem, it may be a resolution issue, where you just need to set it to full screen or something of that caliber.

( to test if this is a valid problem your editor ) if your editor's images + text + icons + folders should appear blurry, this may be a resolution problem.