Drag the Object Finder control over the Place an Order dialog, moving it to the title bar so that the entire dialog is surrounded by a red outline, then release the mouse button.
将Object Finder控件拖到Place an Order对话框上，将其挪到标题栏上，以使整个对话框四周包围着一个红色方框，然后释放鼠标按钮。
By clicking and dragging with the left mouse button, the handles of the grid widget can be translated, rotated and scaled, in order to test how well straight lines in the image have been undistorted.
通过点击和拖动使用鼠标左键，处理网格的小部件可以移动、旋转和缩放，为了测试直线在图像一直不失真。
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