You'll see a thumbnail preview when hovering on the navigation bullet in above demo. The thumbnail preview is created by the slider's built-in function, thumbnailPreview, and with the assistance of the Menucool Tooltip widget.
Please visit http://www.menucool.com/slider/thumbnail-preview for detailed instructions.
This demo has not used the slider's advanced features, so it does not require the slider license. However, using the tooltip widget for the thumbnail preview requires a Tooltip license.
If you have also included slider's advanced features, slider license is also required.