Start dragging the handle along a particular direction, the object, which is farthest
from the handle in the direction opposite to the explode direction is specify as the
fixed object. Other objects can start moving away from the fixed object along the
explode direction and proportionately according to their distance from the handle.
Without leaving the mouse, when you move the handle in the reverse direction, objects
start coming closer till their initial position is restored.
On continuing further in the reverse direction, the object, which is now farthest
from the handle in the direction opposite to the explode direction is specify as the
fixed object. Other objects are moved away from the fixed object. Fixed object is not
moved.
Unselected, all the selected objects move as there is no fixed product.
By default, is selected.