Snap Points

SpotLight v2.0 Snap Points

When manipulating the SpotLight Gizmo you will notice tiny dots not only on the alpha or texture but also on the selected SubTool. These dots will only appear when your SpotLight Gizmo gets close to them at which point it will snap to them. Only the center of the SpotLight Gizmo will snap to these dots; not the manipulated image.
The SpotLight Gizmo will snap on:

2019_Snapshot_26

The SpotLight snap points. On left is the SubTool bounding box, and on the right is the alpha (or image) bounding box.