Answer
Attach a PinchGestureRecognizer and update Scale from e.Scale around the pinch origin, or a PanGestureRecognizer and update TranslationX/Y from e.TotalX/Y. Track the starting transform in the Started status and apply deltas during Running to keep motion smooth.
void OnPan(object s, PanUpdatedEventArgs e)
{
if (e.StatusType == GestureStatus.Running)
{
image.TranslationX = _startX + e.TotalX;
image.TranslationY = _startY + e.TotalY;
}
}Real-world example An image editor lets users pan a zoomed photo by tracking pan deltas from the gesture start point.