Great idea for creating envelopes.  Thanks, I didn't know I could do that.  However a simple lock/unlock would allow tracks to be controlled individually like a mute/unmute button.  I've added a feature request for this in the bakery. If anyone else thinks this would be a good idea, give it a vote in the bakery.
 
Aric

Easy...
 
In console view, choose Modules and uncheck Volume.
In track view, choose Track Control Manager and uncheck Vol.

When I start a mix I always take a Mix Recall snapshot. It means I can always go back to a start point.

With mix Recall you don't have to use every parameter. You could just select the faders if you want.