Are you still unable to get the Bus Pane visible, Mark? If you don't access to the keybinding try dragging it up into view like I said.
In the Track Pane (left side of the track view where the track controls are) go to the very bottom border of the pane. The cursor should change and you can then just drag it upward. In fact maybe trying going through your screensets as there might be a default one that has the bus pane visible.
@konradh... How to you mean? Cut? Like Ctrl + X cut for copying or just clearing the envelope? Like I said just right click the node to clear all. Not sure how range select would work for stuff like this but I'll try later. Cheers.