magnify

  图创建一个放大框，当一个按钮被按下时，根据鼠标的位置。按“+”/“ - ”，而按下按钮来增加/减少放大。按 > / < ，而按下按钮来增加/减少箱尺寸。 按住Ctrl键的同时单击离开放大图。(Figure creates a magnification box when under the mouse position when a button is pressed. Press + / - while button pressed to increase/decrease magnification. Press > / < while button pressed to increase/decrease box size. Hold Ctrl while clicking to leave magnification on figure.)