Eizo has a new feature on the color calibrating 4K monitors that allows the operator to see what colors are out-of-gamut. This was demonstrated by playing 2020 graded content into two identical monitors, both calibrated for Rec. 709. One showed the transform from the 2020 grade to the 709 grade. The other overlaid a gray color on all parts of the image where the original content was out of the 709 color space. This is an easy and compelling way to identify those colors that color graders need to pay close attention to.