Characters as Markers: How to get rid of the shadows?

[#1]

I like the ability to add outlines to data points. This is very useful for separating partially overlapping data points.

Unfortunately, when characters are used as markers, the outline mode looks very unprofessional - kind of like shadows, but without blur.

Besides turning off the outline mode - is there a way to get rid of the "shadows"?

Names Default to Here(1);
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
Graph Builder(
	Variables( X( :sex ), Y( :height ), Overlay( :sex ) ),
	Elements(
		Points( X, Y, Legend( 28 ), Jitter( "Random Uniform" ), Jitter Limit( 2 ) )
	),
	SendToReport(
		Dispatch( {}, "400", ScaleBox,
			{Legend Model(
				28,
				Properties( 0, {Marker Size( 6 )}, Item ID( "F", 1 ) ),
				Properties( 1, {Marker( "Z" ), Marker Size( 3 )}, Item ID( "M", 1 ) )
			)}
		),
		Dispatch( {}, "Graph Builder", FrameBox,
			{Marker Drawing Mode( "Outlined" )}
		)
	)
);