Hi Mary,
I believe your issue is the thumbnail and the image is overlapping? The word Cutoff is kind of misleading. If so, please navigate to Slider Settings > Navigation > Thumbs and set the Vertical Offset to 0, or a negative value if you want to push those thumbnails downward.
Now the real cutoff issue is on the netbook screen or tablet screen (somewhere 980px to 1200px), to resolve that please edit each of your slides, under the Main Background > Source Settings set the Background Fit to 100% 100%
or try the contain
Yes, your slides will look squeeze a bit, but it is how background-image work. If you don’t like that look, please separate your Text (Text Layer) from the background-image.
Hope it helps,
Cheers!