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I'm reviving this thread because I wanted to set such a color map
how to create it? my fiddling with the colormap tab doesn't have that effect. Or maybe it would be possible to implement such a color bar for kiwi and adjust it freely, as in this example from my sdr transmitter
Have you tried using the Custom Colourmap Extension to define your own?
yes but drawing with lines or RGB points in this window didn't give me a satisfactory waterfall look, unless there is some other way that I don't know about?