How to add buttons to the text toolbar?

[maxv]

I work with some chemical formulas and I'd like to add a couple of buttons to the text toolbar: subscript  and superscript 
So when I write, I obrain this HTML:

Code: Select all

H<sub>2</sub>O + CO<sub>2</sub>

How to add buttons to the text toolbar?

[Edi]

You can add the formatting as follows:

1. open the settings of the editor TinyMCE,
2. add "subscript" and "superscript" in the field "Toolbar top" or "Toolbar bottom" .

See also

https://www.tiny.cloud/docs/tinymce/lat ... ormatting/