keylegend / location=outside position=topright

try this one

老师你好，我的程序如下，请问下您的那段应该放在哪个位置？
data xynda;
  set ynbe.xynd;
  if sbjid=\'001\' then output xynda;
run;
goption vsize=10cm hsize=12cm ;
title height=2.0  \"编号=001 血药浓度与时间的关系曲线\";
axis2 label=(a=90 ) order=(0 to 650 by 50)  ;

/* keylegend/location=outside position=topright;*/
proc gplot data=xynda ;

plot conc*time=extyp/ vaxis=axis2 ;
symbol1 v=dot c=red i=jion;
symbol2 v=triangle c=blue i=jion;
label conc=\'Concentration(ng/ml)\' time=\'Time(h)\';
run;
title;