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How to add the image layer rft to legend in ArcGIS Javascript API

Question asked by mcsuran2332 on Jul 23, 2015


I have 4 image layers (rasters) that use the same rft file for their color ramp.  When I add each image layer to the legend, all that is displayed is "Red, Blue, Green" with a respective colored box next to each color.  How do I use the rft file that I loaded into each image service so the correct color ramp is displayed in the legend?