- Select the drawing and click "Set base line".
- Click on the base line as shown in the drawing, one at a time, and pull the base line as shown on the X-axis.
- Check on the Y-axis and pull the base line as well as the X-axis.
- To delete a base line, click "Delete" and then click on the base line you want to delete
- To move the base line, click "Move", click the base line to be moved, and then click the destination.
- When you are done creating, click "Save".
