Response from Jurgen, concerning the meaning of the
i1 entry ("left t top") for the SET_MARGIN option in SetDraw:
That's an error in the documentation. It should be left in first
column, and top in second, e.g.:
SetDraw(SET_MARGIN, 2000, 2000);
which sets big margins (the space around the areas), the
units are in `pixels'.
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