Jerry, even if there was, it wouldn't help - you still have to right click them one at a time to get to their individual properties.
I think if you use Karl's method it will select all the nodes - but as I said, this doesn't help you if you want to input the values numerically.
In X2a, if you do what Karl says and move the entire envelope, you now get 2 tool tip readouts - one shows the absolute level of the zone where you click, and - much more useful - an indication of how much you've altered the entire envelope by in +/- dB
For really precise adjustments you'll want the entire track maximised vertically