Disable touch screen completely?

[stevenf]

When I'm in SketchBook Pro, I use "Pen Mode" so the touch screen is automatically disabled when the pen tip is near the screen.

However, even in Pen Mode, touch input is allowed for zooming, etc. Somehow I still manage to hit the screen with my palm while the pen is just out of range, which makes my drawing pan and zoom all over the place.

Is there a way I can just turn off all touch input and drive the tablet exclusively with the pen? Either within SketchBook Pro or globally at the OS level?

Thanks!