The Edit menu allows you to
Copy,
Cut,
Paste and
Delete objects with the common
keyboard shortcuts of Ctl+C (copy), Ctl+X
(cut), Ctl+V (paste), and Ctl+D (delete),
respectively. Edit operations can be undone and redone. The number of
undo levels is controlled by an option in
File-->Preferences as we
saw in Section 23.5.1. The default is 15. That is,
you can recover from the last 15 actions!