FIELDS operand: You can use symbols where you can use fields (p,m and p). A symbol for p,m,f results in substitution of p,m.

FILL operand: You can use symbols where you can use constants (C'x' and X'yy'). A symbol for 'string' always results in substitution of C'string'.

  REFORMAT FIELDS=(F1:RDW,Profit_or_Loss,F2:Any_Format,
      F1:Variable_Fields),FILL=filler 

 REFORMAT FIELDS=(F1:1,4,31,10,F2:12,3,F1:451),FILL=C'*'