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Specifies shape resize mode.
• aspect = 0
Show all resize handler, when using the [NW, NE, SW, SE] handler to resize shape, the aspect ratio of the shape will be maintained.
• horizontal = 1
Only show the [W, E] resize handler, which can only change the width of shape when resize shape.
• vertical = 2
Only show the [N, S] resize handler, which can only change the height of shape when resize shape.