Please use this example that illustrates how to access the value used to plot the line for the Bonferroni limits.

```
Names Default To Here( 1 );
// example
dt = Open( "$SAMPLE_DATA/Tiretread.jmp" );
// fit least squares with studentized residuals
obj = dt << Fit Model(
Y( :ABRASION ),
Effects( :SILICA, :SILANE, :SULFUR ),
Personality( "Standard Least Squares" ),
Emphasis( "Minimal Report" ),
Run(
:ABRASION << {Summary of Fit( 1 ), Analysis of Variance( 1 ),
Parameter Estimates( 1 ), Scaled Estimates( 0 ),
Plot Actual by Predicted( 0 ), Plot Regression( 0 ),
Plot Residual by Predicted( 0 ), Plot Studentized Residuals( 1 ),
Plot Effect Leverage( 1 ), Plot Residual by Normal Quantiles( 0 ),
Box Cox Y Transformation( 0 )}
)
);
// access report layer
rpt = obj << Report;
// access plot frame
frame = rpt["Studentized Residuals"][FrameBox(1)];
// access line segments in plot frame
line = frame << Find Segs;
// ask for value of line representing Bonferroni limits (only positive necessary)
bonferroni = (line[2] << Get Y Values)[1];
// display limit in Log
Show( bonferroni );
```