The number is expressed as a fraction of the length of the diagonal of the plot bounding box. If on, the legend labels will be created automatically unless the per plot legend symbol has been set. The coordinates are expressed as normalized values with respect to the rectangle defined by PositionCoordinate and Position2Coordinate. Note that LegendPosition2 is relative to LegendPosition. If plotting points by value, which component to use to determine the value.
Shadows make the text easier to read.
Data outside of the range will be clipped.