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HOWTO: Force IDL 2 use quadrants

How do I force IDL to plot a, say a cirlce in window with a Quadrant set
If the data is only in Quad I it doe'sn't matter, I still want the axis to
-MAX -> +MAX in both X and Y

If I set !X.CRANGE I set it, but when I plot I somehow seem
to have lost the settings I just made
Another problem is plots, that has to plot A line through 0,0 (x,y)
from -MAX, +MAX for X
and  -MAX, +MAX for Y

________ |_________

   Any ideas ???

Greets Sean