F 合适窗口大小D display窗口H help文件F2 delete panelF12 auto mesh panelF10 elem check panelF5 mask panelF6 element edit panel Ctrl鼠标左键 旋转Ctrl鼠标滑轮滑动 缩放Ctrl鼠标滑轮画线 缩放画线部分Ctrl鼠标右键 平移F11 quick