CIR imagery is useful in some cases to determine structural damage and to identify vegetation around structures. You can toggle this layer on and off quite easily with the Layer List in the NICB application:
At the bottom of the window, press the Layer List icon highlighted here
In the Layer list, Check ‘Gray Sky 2018 Color Infrared’ as shown here.
That’s it! you can return to the layer list to toggle it off at any time.