React · SwiftUI · agent guides
Perfect preview
Hold to perfect: while the pen is held still after a rough stroke, the fitted clean shape draws itself round as a faint green outline over 450 ms; when it closes the host morphs the stroke into the shape.
Use it for
- The pen or pencil held still at the end of a rough line, circle, rectangle or triangle (DRAWING.md DR-05). The core's shape_recognize gives the fitted shape.
Don't use it for
- A large closed loop released without holding: that is still a region.