Related Questions:
Can you restore something if it is accidentally deleted?
How do I get back an event order I accidentally deleted?
How do I get back the information I deleted from my Document?
Can I undo deleting an event?
Answer:
If you have deleted something from your Document, you can use the Undo button to get this back.
If you made other changes or closed the Document Editor, the information you deleted is no longer retrievable.