How to Apply Transparency to Featured Box Creator Element
1. Go to your specific Live Editor.
2. Add a "Feature Box Creator" element.
3. Click on "Advanced Options" of the element and then make sure to empty the field of "Background Gradient Start Colour" and Background Gradient End Colour. Update when done.
4. Once done, go to Page Setting >> Other Scripts >> Custom CSS >> insert the code below:
background-color: rgba(255,255,255,0.8) !important;
Please feel free to use your RGBA color. A good site to get the rgb color is http://hex2rgba.devoth.com/.