RST: how to decrease font size in code blocks?

Question

I would like to include a code block in a presentation I am preparing with Restructured Text. But the font used in the code block is huge and it can not fit inside resulting code box:

How can I reduce the font size used in code blocks?

Answer 1

Set the fontSize property of the code style in your style file.

e.g.

code:
    parent: literal
    fontSize: 10

Answer 2

Some of the builtin themes (alabaster) accept usage of custom.css.

Create _static/custom.css and add the following to adjust the code-block font-size:

_static/custom.css:

.highlight { background: #f8f8f8; font-size: x-small;}