Just in case anyone has ever wondered why that one html file—they have on their drive—gets so garbled up, when viewed locally. Well… The solution to such a problem, is in the pictures above. 😉 Always—whenever possible—use utf8.
Now, as for how to reach your settings:
It’s either…
Edit → Preferences → Content → Advanced
or…
Tools → Options → Content → Advanced
Yet another fine blog…. 😅 