You can add markup commands to a text box, and specify, << markup(1) as a second parameter in the text box, You could also try using the function
Expr as Picture(........)
where you can place a formula into the passing element and it will draw a picture. I have not figured out how to specify a Sigma using this method
or you can do something more like:
Names Default To Here( 1 );
new window("Sample",<<journal,
HLB = H List Box(
tb1 = Text Box("S")
)
);
tb1<<font("Symbol")<<set font style("Bold")<<set font size(72)
Jim