Make block equation that katex outputs centering on the horizon.
Select your block equation code or nothing, then press Ctrl + Z, Ctrl + X.
You need to...
Firstly, edit your /path/to/book/styles/website.css or ebook.css, insert:
Then, edit your /path/to/book/book.json, add:
Just for people using gitbook with katex, especially when input LaTeX math equation.
Now you don't need to type the