Hi dhndigitalmarketing,
Please allow me to explain: To use synchronization with the WoodMart Slider widget, you need to have two separate slider widgets on the same page. For e.g:
1. Main Image Slider > Set as Synchronization: Parent
2, Thumbnails Slider > Set as Synchronization: Child
When you click or swipes the main image slider then the thumbnail slider updates to show the active image. Clicking a thumbnail (child) may also control the parent (if bi-directional sync is enabled).
Hope it clears.
Regards,