Pivot Tool
The Pivot Tool in the Multiple Objects Group is a tool for setting the pivot position of multiple selected objects, allowing you to change the pivot to the Center, Top Center, Bottom Center, Gizmo Location of the objects.
It is the same as the Pivot Tool in the Misc Group, except that it can be applied to multiple objects at once.
참고
How it differs from the Pivot Tool in the Misc Group
The Pivot Tool in the Misc Group is different in that it can only set the pivot position for the one model that is selected and being edited.