The page slider can be setup from app/js/src/script.js .  In this file you can customize these slider settings:

self.pageSlider.slick({
arrows: false,
slidesToShow: 1,
slidesToScroll: 1,
infinite: true,
speed: 500,
fade: true,
autoplay: true,
cssEase: 'linear'
});

You can find more settings at http://kenwheeler.github.io/slick/

Also if you want to add more slider items in your homepage, you will have to add a new div which contain the “dm__slider-item” class inside your “dm__slider“.