本界面直接采用易友未开发功能的UI设计， 最低操作系统：win7及以上，如果系统开启UAC请右键以管理员方式运行- The interface is easy to direct the use of the Friends of untapped capabilities UI design, Minimum Operating System: win7 and above, if the system is turned UAC right way to run as admi

选取与最后一条确定边夹角最小的点，即余弦值最大者 -Finally, a selection and determine the minimum point edge angle, ie the maximum of the cosine

本窗口在移动到边缘时会自动吸附左边、顶边和右边，但不会吸附底边，且本窗口的最小宽度和高度分别为380和250.(This window automatically adsors the left side, the top side and the right side when moving to the edge, but it will not adsorb the bottom edge. The minimum width and height of the window are 38