How did you add the furigana to the Anki decks?

[Fozz13]

I am trying to modify some of the cards, and I don't understand how you added the furigana.

[SethClydesdale]

Hello, @Fozz13!

You can add furigana by using the <ruby> and <rt> tags (MDN link). Basic formatting is like this:

<ruby>漢字<rt>かんじ</rt></ruby>