Sends this drawing backward so that it is hidden by more drawings that are in front of it.
GemBox.Presentation (in GemBox.Presentation.dll) Version: 126.96.36.1991 (188.8.131.521)
public void SendBackward()
This method works only if this drawing's Parent
it moves this drawing by one place closer to the bottom-most drawing (first place) in the parent's Drawings