- Enlarge the Diagram.
- Click “Edit.”
- Click on Add/Edit features. Depending on what feature you set to be added you will be able to create either lines or polygons. Once you click on the “Add/Edit features” link, edit mode will be enabled and a blue button will appear on the menu.
- Free draw a polygon as below
- Similarly, lines can be drawn in the same fashion
- You can edit or delete the features by pulling the handles
- Press done when all edits / adds have been completed
- Finally save the diagram