I'm trying to change the font size in my blog posts (in the full post layout) and I don't seem to have the option. My steps:
In Wix website editor, click on the blog post
Select 'Settings'</
top of page
To see this working, head to your live site.
Edited: Dec 06, 2018
Font size cannot be edited in blog post in the full post layout
Font size cannot be edited in blog post in the full post layout