How to edit my Rich Text Font Style in Blogs?

I am unable to change the font style as well as the size for the blog content as it is rich text. How can I do so?

Here’s ink to my webflow: Webflow -

First, drop a new rich text element onto any page.
Give that RTE block a class.
Select one of the elements in the block. (in my attached example, I’m using the H2 heading)
You’ll see there is a way to assign the style to the H2 that’s nested in the RTE
Once you’ve styled everything. Go back to your blog design and assign the blcok class to it.

there’s videos on this too: