Alternatively, double-click the title bar or a grey empty place without icons on the toolbar, while holding down the Ctrl key. To reattach a floating window, drag-and-drop the window's title bar to an edge of the document window. The mouse pointer should be very close to the document window's edge when you release the mouse button.
要重新附加浮动窗口，请将该窗口的标题栏拖放到文档窗口的边缘。松开鼠标键时，鼠标指针应该非常接近文档窗口的边缘。