Move and drag flexibly, and create sketches on any surface freely

Move and drag flexibly, and create sketches on any surface freely. It is recommended to add the ability to sketch in edit mode, which can be used to quickly sketch with various types of lines and trim commands on any surface with various constraints under rich capture conditions. When moving, it is best to click at any point of a model, after clicking, there is a moving three-dimensional coordinate that can be dragged or rotated angle, and when dragging and moving, you can quickly input the value that needs to be changed in the input box with distance or angle on the trajectory of the model movement. The whole process of moving has a starting point to set, just click on the starting point with the mouse to set the direction of movement and you can easily complete the movement. The value of the transformation increment in the right window is always unchanged; Whether you use a shortcut key or drag the arrow on the coordinates with the mouse, as long as the position changes, the transformation increment here should show the current amount of movement, rotation, and scale in time.

灵活移动与拖拽、可以自由在任意表面建立草图。建议在编辑模式添加可以绘制草图的功能，用于在任意表面使用各种类型的线以及修剪指令在丰富的捕获条件下配合各种约束条件快速绘制草图。移动的时候最好可以在一个模型的任意一个点点击，点击后就有一个移动的三维坐标可以拖拽或者旋转角度，在拖拽与移动的时候可以在模型移动的轨迹上有距离或者角度的输入框快捷输入所需要变动的数值。整个移动的过程有起始点可以设置，只需要用鼠标在起始点上点击一下设置好移动方向就可以轻松的完成移动。目前在右侧窗口中的变换增量数值总是没有变化；无论是用快捷键还是用鼠标拖拽坐标上的箭头，只要发生位置变动，这里的变换增量就应该及时的显示当前移动、旋转、缩放的变化量。

When selecting points, lines, and faces, you can directly use the mouse to click, use Ctrl+Mouse Wheel to switch the mouse cursor position of all the elements of the model from the top to the bottom (from the visible surface to the shadow surface), and click to select the element directly after the selection is completed. In addition, there need to be alignment, tangent, coaxial, etc., which can be freely added and removed to complete the rapid position change of the unknown position model.

在选择点、线、面的时候直接使用鼠标点击，用ctrl+鼠标滚轮来切换鼠标光标位置模型从顶到底（从可视面到阴影面）所有的元素，挑选完成以后以后直接点击选中该元素。另外需要有对齐、相切、共轴等等等可以自由添加与删除的位置约束来完成未知位置模型的快速位置变化。