Is there a way to add a launch button to a third-party theme

[liuhuanshuo]

Through Galley's demo, I learned about some third party themes

Quantecon_book_theme, for example, which I love

But he doesn't support using Live Code

Is there any way to add a thebe button in the position below

I tried to find the template file and CSS code for this theme

It seems to be defined below, but I don't know how to change it

Is there an easy way to modify it or is there documentation to learn from

I don't expect an exact answer, but can someone tell me what direction I'm going to change