This script uses a dialog to allow the user to apply a custom colour lookup table (CLUT) to the foremost image. All the CLUTs are generated within the script so there is no external dependency on CLUT images stored in the system.Images with custom CLUTs applied are not converted into RGB images by this script. Images will need to be converted to RGB using the menu command Object/Create Image From Display. Colouring greyscale images can be very useful for highlighting subtle variations in greyscale such as in thickness maps. The reason is that our eyes are only sensitive to about 30 greyscale levels, but to 16 million colours. The scale pasted on the image floats, and can be stretched, repositioned or deleted.