Image Hotspots is a nestable element made of Hotspots elements.
You can add, delete and duplicate hotspots at the structure panel or using the repeater control at Image Hotspots element.
Hotspot is also a nestable element, you can place any content at it and it will be displayed as a hotspot.
In addition, Hotspots contain Tooltip elements that are also nestable. The content you place at the Tooltip will be displayed when triggering the hotspot.
Hotspot and it's Tooltip styles are applied at that Hotspot element.