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Paul, If you want to create a white background, you can run the gpcolor program and set COLORS = 101=white for xw or gf drivers. I actually used the ps driver for the tropical map since I want to use DATTIM=all for all the analysis positions I have decoded with dctrop. I just noticed that my markers weren't updating. Fixed that. Now you see tropical storm and hurricane symbols where appropriate. Steve Chiswell Unidata User Support On Thu, 28 Sep 2000, Paul Ruscher wrote: > Hi, Steve - I like your track map...how do you make the background white > in gempak? I've tried to use ImageMagick's convert function but all I get > is a huge expansion of the size of the file. Thanks! > > Paul > > >