Add Shadows to ShopIsle Slider Text and Button
Start off by installing the plugin Advanced CSS Editor and in Appearance -> Customize -> Advanced CSS Editor add the following code which applies to you:
Slider Header Text:
.mb-30{ text-shadow: 2px 2px 3px black; }Slider Sub Text
.mb-40{ text-shadow: 2px 2px 3px black; }Slider Button
.btn.btn-border-w{ box-shadow: 2px 2px 3px black; }
Details about text shadow could be seen here: