Service Program Argument Optimization

I have created six modules, and then created a service program from
these (my first one YAY!).  I was displaying the service program, and
on the Procedure Exports screen, all of my procedure exportes are
listed, and the 'Argument Optimization' field says *NO.  Now, I am
curious.  The help text speaks of some mysterious way of optimizing
the passing of args to ILE procedures (which I am doing).  All six of
these procedures in the service program receive a single 140 Alpha
parameter, by value.  i.e.

     D CBI_R061        PR                  LikeDS(temp_Box)
     D  ReportLine                  140A   Value

Now, to me, passing 140 bytes to an ILE procedure would be a great
candidate for optimization.  Is there some way, while creating the
module, to specify this optimization is to take place, or to be
attempted?  Is it when I create the service program?


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