ESRI WebApp Builder

[CenterlineMapping]

Is it possible to change the color ramps of image services within the Web Application?  Currently, we apply a raster Function Template to each image service layer in the Web Map which gives each raster a color ramp (for example, black to white).  We are curious if it is possible to allow the user of the application to change the raster function template or color ramp for the image service layers within the application.  Any advice is very helpful. 

[RebeccaStrauch__GISP]

I don't have an answer for you, but I would suggest you edit your question title to be something like "Change color ramps of image services within WAB" rather than the generic "ESRI WebApp Builder" you have now.  It may get more hits and answers.  You already have it in the right GeoNet group for custom widgets.  Just a suggestion.