DeviceRGB supports multiple layers, and masking devices and keyboard keys. You can use these features for a tutorial, highlighting only WASD with a special material to show the user how to move.

There are a few different functions to modify the layer stack, and they are pretty self explanatory. Generally, you can just use AddLayer and RemoveLayer, but there are a few more functions for special circumstances.

If you only want your layer to be applied to certain keys or devices, you can either add keys you want to select to the Keys array, or select devices using the DeviceTypes enum. Note that if you select Keyboard as a device type, all keys will be added to the mask, even if the Keys array is used.