How to delete an item / connecting line

To delete an item:

• Click on the requested item and select Delete icon from the popup bar above it.
• Click on the requested item and press Delete on your keyboard.

To delete the connecting line or both the connecting line and the name of the relationship:

• Click on the name of the relationship or the green small button on the connecting line and select DELETE from the selection above.
• Or, click on the name of the relationship or the green small button on the connecting line and press Delete.