Hi - In Ferret's gif mode, you can set the background color to "transparent" (in Ferret v6.2 and higher): > ferret -gifThen you can view it on top of some other image, for instance just a colored background in an html file: <html>I see that this hasn't made it into the Ferret documentation - we'll get it in there. Ansley On 7/12/2011 2:43 AM, Ryo Furue wrote: Hi JQ, | How to use ferret to set an image file (maybe gif format) as the | background, Other plotting will overlay on top of it? I don't know if it's possible to do it interactively, but you can add your background later: 1) Plot something on Ferret and generate an EPS of the plot. 2) Convert it to a PNG file: $ convert -density 200 ferretplot.eps ferretplot.png Here "density" is the resolution in DPI. For oral-presentation slides, 100 to 200 is usually good enough. 3) Overlay it on your background image: $ convert -coalesce mybg.jpg ferretplot.png merged.png You'll obtain merged-0.png and merged-1.png, the latter of which is what you want. But, I don't know how to adjust the relative sizes of the background and the plot. You may have to fiddle with the metadata denoting the physical sizes (DPIs) of your images. One caveat is that missing values of the variable you plotted is converted to transparent by the convert command. So, in the final merged image, the original missing values become "windows" to the background image, through which you can view the background. To avoid that, you would have to paint the missing regions in white. Regards, Ryo |