Multiple Contact Geometry
Zoom controls provide an alternative to a two-finger gesturePreview (macOS)Preview: page scale changes with a pinch or toolbar controls
- Zoom controls provide an alternative to a two-finger gesture
Finger separation changes scale. Pinching zooms a document in Preview; the app may receive a recognised gesture instead of two contact coordinates.
Design tips
- Do not promise finger coordinates when the API only supplies a zoom gesture.