Is there a way to disable multi-touch gesturing in Lion? Now it seem that one must use 2-finger gestures for basic functionality. I was hoping to find an option in Accessibility to get around this, similar to Assistive Touch in iOS 5, but it seems to be hiding from me. My son has cerebral palsy and uses solely his pinky finger to use his MacBook Pro. If I cannot find a way around this, he's stuck with Snow Leopard.