works such that my thumb nails never disappear or go away no matter how I
move my mouse. Some of my users will become confused if the thumbs
disappear when they move the mouse onto the main image.
1. Disable carousel autohide:
User interface => View Mode tab => Carousel => Carousel Panel Auto Hide
2. Also you can disable description (and use captions instead as a short description)
User interface => View Mode tab => Image => Show Image Description