I have created a volume envelope that "gates" the snare track.
 
So there are nodes at off (-inf) level, and nodes at roughly good mix level (around 0 db). 
I want to adjust the top nodes (at roughly 0 db) without moving the bottom (-inf) nodes.
I can select the top nodes individually but that takes too long.
 
I want to lasso the top nodes (at roughly 0 db) and move them without affecting the bottom nodes (set at -inf).
But apparently there is no way to do that, right?
 
 
edit: added [Answered] to subject - scook
 

Right-click, lasso the nodes in either the automation lane or track like this

Scook,
 
1] Thank you!
2] How do you insert a looping video clip into a comment? (Or please direct me to a resource that explains how)

I used LICEcap to capture the screen to a GIF then uploaded the GIF to imgur.com then click this

and pasted it into the message