How do you make the first letters bold like the ad shows?

update the app, and when you go to someone's post (to write or read comments), there are button "Aa" in the upper right corner, click there and select "NeuroReading"!

I want to know how to make everything I read look like that!

It doesn't look anything like the ad! Such a shame!

Go to the little filter icon in the corner and then settings, and then turn neuroreading on