This isn't strictly a Maple question, however, it arises because I'm trying to convert a Maple postscript plot to a png and it is not working; the result has no background color so is essentially impossible to view.  I use ImageMagick's convert to convert from eps to png.  Previously I hadn't had a problem with that, probaby one of my upgrades has changed something (ImageMagick).  Any ideas?  Presumably there is a way to force a background color with the ImageMagick convert command, but the obvious guesses haven't worked. 

Followup.  If I open the png with the display command, and then left click to bring up the ImageMagick menu, select Miscellany -> Show Matte I get what I want.  Any idea what option to convert has that same effect on the produced image?


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