graph: thicker line for datum axis
In my graph, x-axis is in the middle as I have some negative y values. It is
hard to distiguish x-axis from other horizontal lines (they are all with same
thickness).
Is it possible to make only one line (x-axis line) thicker than others to be
recognized?
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Rasoul Khoshravan Azar
Civil Engineer, Osaka, Japan
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