The programming function CNTL2TXT copies the values of XLAST and YLAST to the text-handling coordinates XLSTT and YLSTT. Assigning missing values to X and Y forces the SYMBOL function to use the values of XLSTT and YLSTT to position the star. The text string V is the character code for the star figure in the MARKER font assigned by the STYLE variable.

   function="cntl2txt"; output;
   function="symbol"; style="marker"; text="V";
      angle=0; color="white"; size=10; x=.; y=.;
      output;
   end;
run;