<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1516981859989_9187">Dear NCL Users,</div><div id="yui_3_16_0_ym19_1_1516981859989_7393" dir="ltr">I did an overlay of an xy plot on a few plots. The problem is I can't find an example or a function that I could use in masking out areas just beneath the xy plot (the green line is the xy plot). I am counting on your invaluable insight and help in solving this problem. I have attached the plot and associated files herewith. I am using NCL Version 6.3.<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1516981859989_9186">Many thanks.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1516981859989_9238">D. Montgomery<br></div></div></body></html>