To add a new slider item copy/paste a slide item and fill it with your data.
<div class="owl-carousel text-full-width-slide"> <!-- Slide item --> <div class="item"> <div class="container"> <div class="row"> <div class="col-md-12"> <h1 class="slide-main-title">Slide title</h1> <h5 class="slide-subtitle">Slide subtitle</h5> </div> </div> </div> </div> </div>