Can you help me please. I have Macbook pro retina 15 and photoshop 13.1, I open my last project and in 100% zoom all good but very small. In 200% so blur, how can i imitate my last resolution or enable retina mode in new photoshop, thanks!
Your current version is 13.0.1 (not 13.1) and retina mode is introduced in 13.0.2. This should be available now via Adobe Update. You don't need to do anything to enable retina mode: it'll just work once you've updated.