Photoshop support for 4k display

BTW, just so we're clear - Photoshop doesn't scale the image itself. That's, as always, one image pixel to one screen pixel at 100%. So the image will display smaller than you're used to.

This is in contrast to web browsers and picture viewers that scale the image up to compensate for the high resolution. Just pointing this out because a lot of people misunderstand this.

As long as your Photoshop and Windows versions are current, you'll be fine. Most of the complaints have come from CS6 users who can't accept that their software is six years old.

The way this works now is that Photoshop automatically picks up UI scaling from the Windows setting - in 25% increments. This is important. The PS Preferences setting for UI scaling - 100% or 200% - is not used. That setting is now only for users with older Windows versions.