\begin{xy}
% \xyShowAllMarkedPoints{}{\Fname}{\grExt}%
 \xyWARMprocessMoEPS{\Fname}{\grExt}
 \xyMarkedImport{\Fname}
 \xyMarkedPos{phi}*++!L{\varphi}
 \xyMarkedPos{theta}*++!DR(.4){\theta}
 \xyMarkedPos{x}*+!UL{x}
 \xyMarkedPos{y}*++!R{y}
 \xyMarkedPos{xy}*++!U!L(.15){(x,y)}
\end{xy}