Razer.com Chroma demo vs Synapse 3 (Razer Blade 15)

Hey guys, at https://www.razer.com/chroma the demo change Parts of my Keyboard. I own a Razer Blade 15 Base Model, it has a Single Zone Chroma Keyboard. Thats okay, but the demo change parts of it and in Chroma Studio i can only change the whole Keyboard. Is there a feature i missed? I don´t mean to change the color of different parts, but some parts a dark and others are bright. So it must be a Synapse 3 restriction not hardware right? Can someone explain that to me? Greetings.