hi, I don`t know of any way to disable more then one node at once.
Perhaps if you set up your network with this in mind you could do branches...
But you can of course go through each and every one node and untick "Enable". Cumbersome, sure.
Another way is to look at the node itself in its own 3D preview window.
Right-click on the node and choose "Open Preview in New Window".
That shows what the node is doing at this point in the network.
It is the middle one of the three icons under the "Stay Open" button on the nodes Property Page.
Not all of the nodes have them anymore.
You can move around in this window like in the scene though it does not show the whole environment. It is a perspective view.
Don`t open too many of them from too may nodes at once or TG crashes.
Hope that helps.
CHeers, Klaus