To create a custom loading for the slider, you just need to add its markup as a direct child element of the slider element with ms-loading-container
class name. Below you can find an example:
<div id="masterslider" class="master-slider"> <div class="ms-loading-container"> <img src="../path/to/loading.gif" alt=""> <!-- or any other form of loading --> </div> <div class="ms-slide"> <!-- slide content here --> </div> <div class="ms-slide"> <!-- slide content here --> </div> <div class="ms-slide"> <!-- slide content here --> </div> </div>