Help please: How to change sensitivity or disable Touchpad while typing on ThinkPad T430 w/Windows 7 Professional...

How do I adjust Touchpad Sensitivity or disable touchpad while typing on ThinkPad T430 w/Windows 7 Professional?

Cursor jumps while typing. Searched through all the various settings for mouse, touchpad, sensitivity, etc. Unable to find where I can change sensitivity/disable touchpad while typing.

Thank you for your help.