Hi @BHarris,
I believe the following jsl can do what you want:
Window(1) << Copy Picture();
Window(1) will point to the last active window (note: not currently active, 0 would point to the script window), and << Copy Picture() will place an image of that report's display box into the system clipboard. I don't usually like referencing things in this manner and a better practice would be to work with the handle from the platform if you have it, as in the scripting index for Copy Picture():
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
biv = dt << Bivariate( y( :weight ), x( :height ) );
rbiv = biv << report;
rbiv << Copy Picture();
I hope this helps!
@julian