How To Set Up A LearnDash Sample Lesson

Give your prospective students the ability to preview your course content by marking specific lessons as sample (free) lessons.
Launch your online course at LearnDash.com.

[@JakLepiejZyc]

I did that but still cannot see the chosen lesson as a visitor. Any ideas what could be the problem?

[@MikeHudsontek]

Nope, I don't get this option here. I only have the option for a whole chapter. Anyone know why?