Greetings, how could I add custom symbols in an epub file that can be recognized by e-readers? The symbols are supported by UTF-8 but they don't appear in my e-reader (Kobbo Librba 2).
These are some examples of the symbols: ☉︎ ☽︎ ☿ ♄.
These are some examples of the symbols: ☉︎ ☽︎ ☿ ♄.
