Universal Windows Platform (UWP)
A Microsoft platform for building and publishing apps for Windows desktop devices.
3,009 questions
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I try to UWP app submission, and I set any package, etc.
but i can find app screen shot setting page.
How to set app screen shot?
For me, I have to go into Store Settings and then into the individual languages -- in your case, try clicking on the Korean (Korea) language.
It's not super discoverable.