disable trackpad with Logitech M720
I have a new 16" MacBook Pro which has a large track pad. I use an Logitech M720 mouse connected by bluetooth. I want to be able to disable the trackpad when I am typing because I sometime touch the trackpad with the palm of my hand and send the curser flying. Clicking "ignore built-in track pad when mouse is present" in pointer control does not work. Is there another solution?