How can i enlarge the default size of picture?

[#1]

*If i think the default picture size is small and i want to enlarge it, what should i do ?

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
Bivariate( Y( :weight ), X( :height ) );

*The script i use to control the size is below, but the pic has no change after i add size(1000, 800), Why it now work?

Names Default To Here( 1 );

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );

Bivariate(
	Size( 1000, 800 ), 

	Y( :weight ),
	X( :height )
);

[#2 · Accepted solution]

You can change the size of all graphic window's defaults in JMP Preferences

     File==>Preferences==>Graphs

If you want to change just the scatterplot window in the Bivariate Plot you need to change the Frame size.

names default to here(1);
dt=open("$SAMPLE_DATA/big class.jmp");
biv=Bivariate( Y( :height ), X( :weight ) );
report(biv)[FrameBox(1)] << frame size(400,400);

See the Scripting Index for examples 

     Help=>Scripting Index

[#3]

Thank you!