There is a very powerful and useful variant of the resize handle: a vertex handle.
其实，还有一种功能强大的调整大小操作点变体，即顶点控制柄。
Drag onto the page. Drag round rotation handle to change arrow direction; yellow diamond to resize line ends.
拖到绘图页上。拖动圆形旋转手柄可更改箭头方向；拖动黄色菱形可调整线端的大小。
The corner "handle" will usually resize the image maintaining the overall height-width ratio.
角落“处理”通常能重新调整图像大小，保持总体的高-宽比例。
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