Formatting elements in Graph Builder

[#1]

Hello - I'm going crazy because I can't figure out a way to change the number for decimals shown in my graph from 3 decimals to 2 decimal points.

I have tried multiple menu options and I can't find an option to format R2 on the Line of Fit in graph builder. Can someone tell me how do I change the format so the graph shows ONLY 2 decimal point on the R2 and the formula prediction? See the JSL from the platform below, and attached picture with the elements ont he graph I want to change 

Graph Builder(
	Size( 1078, 745 ),
	Lock Scales( 1 ),
	Set α Level( 0.05 ),
	Variables( X( :In Vivo DT ), Y( :In Vitro DT ) ),
	Elements(
		Points( X, Y, Legend( 5 ) ),
		Line Of Fit( X, Y, Legend( 7 ), Degree( "Quadratic" ), R²( 1 ), Equation( 1 ) )
	),
	SendToReport(
		Dispatch( {}, "In Vivo DT", ScaleBox,
			{Format( "Fixed Dec", 12, 0 ), Min( 7.9098 ), Max( 14.4702 ), Inc( 1 ), Minor Ticks( 0 )}
		),
		Dispatch( {}, "In Vitro DT", ScaleBox,
			{Format( "Fixed Dec", 12, 0 ), Min( -50 ), Max( 125 ), Inc( 50 ), Minor Ticks( 1 )}
		)
	)
);

Edit by txnelson of JSL into JSL Display Box

[#2]

I'm not sure if that can be modified without JSL. You can access the TextSeg in the framebox, get text, modify it and then set the modified text

Names Default To Here(1); 

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

gb = dt << Graph Builder(
	Size(525, 454),
	Show Control Panel(0),
	Variables(X(:weight), Y(:height)),
	Elements(
		Points(X, Y, Legend(9)),
		Line Of Fit(X, Y, Legend(11), R²(1), Equation(1))
	)
);

seg = (Report(gb)[framebox(1)]) << Find Seg(TextSeg(1));
orig_text = seg << Get Text;

first_part = Word([1 -2], orig_text, " ");
second_part = Word(-1, orig_text, " ");
formatted_second_part = Format(Num(second_part), "Fixed Dec", 5, 2);
final_text = first_part || " " || formatted_second_part;

seg << Set Text(final_text);

If it isn't possible to do this without JSL (not sure like I said) might be worth making wish list item about this.