Hm, when I type alt+x I get ≈
when I go to insert -> symbols I can choose out of a limited number of fonts and none of them has the signs. (see picture 4)
The first is "normal text", which I assume is, what is selected out of the endless numbers of fonts. But I don't have "Latin-A extended". The Fonts beginning with "L" are "letter gothic std". (see picture 5).
I don't know how to use unicode.
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