To add a new testimonial in slider copy/paste list item in testimonial-slider section.
<li class="testimonial-item"> <div class="testimonial-container"> <div class="testimonial-auth"> <div class="testim-auth-photo"> <img src="images/testim-auth-photo/auth1.jpg" alt=""> </div> <p class="short-info">Name,<span class="auth-country"> info(city, phone number...)</span></p> </div> <p class="main-testimonial">Main testimonial</p> </div> </li>