PeachBrackets
PeachBrackets.Annotations.PageFormField
PageFormField.Bounds Property
Where the control sits: its box, or the bounding box of the drawn shape when a transform moved it. A control that was not
drawn on its page (a projected plane outside the clip, wholly behind the viewer) keeps its field - it still holds a value and
belongs to its form, and a radio group would lose a member - so this is then an empty rectangle at its bottom-left corner,
with nothing to see or click.
public PeachDrawing.Core.Rect Bounds { get; init; }