To add a new portfolio item, search for the portfolio-content block, and copy/paste the list item in the ul tag.
<li> <div class="portfolio-slide-item"> <div class="portfolio-item-content" style="background-image: url(img/portfolio/small/pop1.jpg);"> <img src="img/core/placeholder.png" class="placeholder-image" alt=""> <!-- Your portfolio item thumbnail --> <img src="img/portfolio/small/pop1.jpg" class="portfolio-main-img" alt=""> <div class="slide-item-hover-view"> <!-- Href content is link to your fullsize portfolio item image --> <a class="fancybox" data-fancybox-group="gallery1" href="img/portfolio/fullsize/img_1.jpg"> <span class="img-view-hover"> </span> </a> <span class="hover-vertical-line"> </span> <span class="hover-horizontal-line"> </span> </div> </div> </div> </li>