US Patent 10180714 Two-handed multi-stroke marking menus for multi-touch devices

A user interface provides for multi-stroke marking menus and other uses, for use on multitouch devices. One variant of multi-stroke marking is where users draw strokes with either both hands simultaneously or alternating between the hands. Alternating strokes between hands doubles the number of accessible menu items for the same number of strokes. Other inputs can be used as well, such as timing, placement, and direction.