Operation description:
1. Choose a graph A at will
2. Click on the graph A
3. Move the mouse to the edge of the graph A and change to a small pointer (there is a small black dot at the end of the pointer)
4. Double-click the left mouse button
5. The border anchor point of figure A has changed from a square to a rhombus.
6. At this time, you can directly click the left button on the border to add a rhombus, and the anchor point can be changed to change the shape. Right click to select delete and curve.
Operation Description:
1. Select, View->Tools->Custom Basic Tools
2. Insert an object, select painting.
3. Use the pen to draw directly.