Hi all!
I am now dealing with a very special book using a lot of math chars. Most of them can are embedded in the fonts we use, like ¬, ∈, ∀ or ∃. But some are not, e.g. ℕ (symbol of natural numbers).
So, they are also not visible in readers like ADE, Calibre or on devices.
Now I have used an HTML Entities code for this in Sigil: ℕ[semicolon] (I am writing like this, because you'll see the symbol otherwise)
Sigil presents it as a symbol given above, but after I save the file, Sigil automatically converts the code into a special character such as this:

(alt="bold, empty N"). This character is not visible in ADE, and I do not know how to force Sigil not to convert code into spec. chars.
Can this be done at all in this version?
Thanks
Bart