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<DIV><FONT face=Arial size=2>Hi all, </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm problems tu use coordinates (x1,x2)(y1,y2) in
environment:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>\begin{pspicture}(x1,x2)(y1,y2)</FONT></DIV>
<DIV><FONT face=Arial size=2> "PSTricks code"</FONT></DIV>
<DIV><FONT face=Arial size=2>\end{pspicture}</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>which are their purpose ?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For example: (-7,-4)(7,4) what is?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If I wish a centered image, how do I
it?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Paolo.</FONT></DIV></BODY></HTML>