Hi Mr. Crowley :D,
Thanks a lot for the feedback. We’ll probably add this as an option in a future update.
Until then, add this code to the custom CSS area:
.nivo-caption {
background-color: rgba(0, 0, 0, 0.7);
}
The 0.7 value is the opacity. It ranges from 0 to 1 where 0 is fully transparent and 1 fully opaque. Experiment with it.
Good luck!