Tools | Customize
[Status]
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[√] Return Method
If it is an “English” Ansi file, it will display Western EUropean.
If it is unicode, you’ll see UTF-8 , or UTF-16LE, etc.
Personally, I’d prefer to just see ANSI, but EmEditor is used all over the world and it makes sense that it will show the actual ‘codepage’, though customizable in that aspect would be good.
Just save a file in one of the UTF formats during Save-As, or File|Reencode, and you’ll see that.