Featured content

Hi guys!
Everything is great, thank you!
Just one simple question: hot to set featured posts? I mean where in the post I may tick that this post is featured?

I want to create “slider” on the main page with featured posts. Customizer > Featured Content… It’s enable, number is 4.
BUT how to choose these posts from the list? I have “Stick this post to the front page”… but it’s for another option… Please help =) Regards!