If you have one of the Wacom's buttons set up as the middle button then:
You can pan/tilt by pressing the Middle Button while hovering the pen
You can Zoom in/out by keeping the Middle button pressed and moving the pen left/right on the tablet
You can orbit the view by pressing ALt+ Middle Button and hover the pen
You can disable any node by selecting it and pressing CTRL+P for Pass Through mode. You can do this for multiple nodes as well.