Mocha Pro 2019.5 now features Edge-Snapping splines for enhanced roto and masking shots. After creating a Mocha shape, use the following keyboard shortcuts to activate edge-snap:
Alt+S keys to snap selected control points
Hold S key for snap drag selected points
Follow along with Mocha specialist, Mary Poplin in this quick tutorial and learn how to roto with fewer keyframes. Choose from Bezier, X-Spine, magnetic spline or freehand tools. Link splines to planar tracking, then use edge-snapping to speed up the process.