why the output I get is not the same with the output on textbook

[tianerhu]

title "Random Assignment - Three Groups";
proc report data=Learn.Assign panels=99 
            headline ps=16;
   columns Subject Group;
   define Subject / display width=7;
   define Group / width=5;
run;

partial of the my output like this :

the output on textbook like this:

[Tom · Accepted solution]

The book output looks like normal listing output.  Your screen shot looks like ODS output to HTML destination.

I suspect that the PageSize option does not apply to ODS output.

[tianerhu]

Thank you for your help.