To add a point to an internal line or edge:
1. On the Main toolbar, click Pen.
If you want to add the point to an internal line, on the Horizontal contextual menu, ensure:
If you want to add the point to an edge, on the Horizontal contextual menu, ensure:
Click on the line or edge where you want the point. The point is added to the line or edge.
Once you have added the point, you can edit it. For more information, refer to Edit a Point.