To move the selected object’s pivot
To move the pivot point using exact values
To reset the selected object’s pivots to center
To make the selected object’s pivot points visible in the scene
When you transform components, Maya creates a temporary pivot at the center of the selected components. Because the pivot is always at the center of the selection, selecting or deselecting additional components moves the pivot.
You can lock the pivot in place so it won’t move as components are added to or removed from the selection.
To keep the pivot in place while working with components
If the pivot point of an object is changed from its default value, duplicating multiple copies of that object results in additional transforms to the channels of the duplicated transform node. However, the resulting position, orientation and the pivots of the duplicated objects will be correct. To avoid these extra transforms, the duplicate command should be invoked with No of copies set to 1. The hotkey g can then be used as many times as needed.