It would be called ctype display, it has no special effects. It changes the color of every particle which has a ctype to the color of their ctype. If no ctype, then the color stays the same. It also automatically turns the deco off when being used, and when you switch to a different display deco will be visible again. The main use would be to see different ctypes of different elements without having to hover over them one by one. Please tell me if you like, or dislike this suggestion.