3D Slider Images not fitting correctly and changing ability to read description

Experimenting with adding images. Is there a particular size the image must be? It doesn't seem to matter the image I add, it removes the ability to click on it, and read the description.

Under the image location, it mentions to leave blank if images are within the themes directory. I can't seem to find that. When I do identify the location as my Media Images(WP), the pic can be too small or too large. Regardless it removes the ability to click on it and read description.

Thanks,
Robert