Featured blog posts are setup where?

In the Catch Fullscreen Pro demo ( https://catchthemes.com/demo/catch-fullscreen-pro/ ) there are four sections after "Our Team" - namely "Green Meadow", "Classical Guitar", "Wild Elephant" and "Ocean Adventure" Please can you tell me which part of the theme customizer they are controlled by and how the settings should be so that they are vertical rather than a slider? I cannot for the life of me make my site behave like the demo.