Razer Mixer Audiomix/Streammix

Hello can someone tell me how I can change the Volume for example when I play a game or listen to music the stream also hears it as loud as I’m. I want to hear different volumes for me and the stream. i was using Nexus before and I was able to change the volumes on the go from the device. would be cool if we can for example hold the mute button for a sec and it changes from Streammix to Audiomix and vice versa.