[gradsusr] highlight or bold the equator horizontal line

[Sourabh Bal]

Dear users,

I have latitude on Y axis in my plot. I want to highlight or bold (increase
the thickness) the equator horizonatal line. Can any one of you please
suggest how to do that?

regards

Sourabh

-- 
Dr. Sourabh Bal
Post-Doc Fellow
Institute of Meteorology, Freie Universitat, Berlin
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