Type the number of pixels for the vertical touch margin. The vertical margin is along the object's top and bottom edges. The vertical margin is a touch-insensitive margin inside the object’s top and bottom edges. If the operator presses the touch-insensitive margin, the button press is not registered.
This property is useful for buttons that are positioned close together. A touch-insensitive border on each button helps ensure that an adjacent button is not pressed by mistake.
If the Shape property is Circle or Ellipse, the touch margin applies to the button’s bounding box.