When hovering over a shape, connector handles appear around the shape.
使鼠标停留在其外形上时，连接器处理程序出现在外体周围。
If you right -click on the freeform object and choose Edit Points from the context menu, the bounding rectangle disappears and vertex handles appear instead.
如果随意右击图像并在背景菜单中选择编辑顶点，这个矩形外框就会消失，由顶点操作点取而代之。
When a control is selected, it has a shaded border around it with solid (active) or hollow (inactive) "sizing handles," small squares that appear in the selection border.
当选定一个控件时，它的周围有阴影框以及实心(活动)或空心(非活动)“尺寸柄”，即出现在选框中的小方块。
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