\begin{xy}
% \xyShowAllMarkedPoints{}{\Fname}{\grExt}%
 \xyWARMprocessMoEPS{\Fname}{\grExt}
 \xyMarkedImport{\Fname}
 \xyMarkedPos{Ct}*+!LU{C_t}
 \xyMarkedPos{C}*++!L{C}
 \xyMarkedPos{M}*+!LD{M}
\end{xy}