From the customizer sidebar go to Avadant Front Page Sections → Slider Setions
Enable Slider On Homepage → allow you to set the slider Enable/Disable for fron page template.
Slider Overlay → Change Slider Background Overlay Color.
Slider Overlay Opacity → Change Slider Overlay Opacity
Slider Content → Add New Slider and Put Content In Slider By Collapsing Slider Tabs.
