Multi-touch Interaction

An input method where a touchscreen or trackpad recognises two or more simultaneous points of contact, enabling gestures such as pinching, rotating, and swiping with multiple fingers. In accessibility contexts, multi-touch interaction is significant both as a challenge and an opportunity: some users with motor impairments find multi-finger gestures difficult to perform, while for users with visual impairments multi-touch can provide a reference frame — for example, anchoring one finger on a known location while exploring with another. Assistive technology guidelines, including WCAG, require that functionality available through multi-point gestures also be operable with single-pointer actions.