First, log into epicApps and then to pageBuilderPro. Once done, go to Media Widget and click the Add to Page Builder button to add the gallery widget to your BigCommerce Page Builder.
Lastly, you can go to your BigCommerce site and proceed to the Page Builder where you can add the pageBuilderPro widget (ePic Gallery).
To add images, simply click on the Plus(+) icon and upload or use the photos you wish to show inside the gallery widget.