> (shortcut: C+z) reverses the
most recent editing command. For example, this can be
used to restore unintentionally deleted text. More complicated operations,
such as a search and replace, can also be undone.
If you undo too many changes,
> (shortcut:
C+e C+z) can restore
the changes again. For example, if some
text was inserted, will remove it from the
buffer. will insert it again.
By default, the last 100 edits is retained; older edits cannot be undone. The maximum number of undos can be changed in the pane of the > dialog box; see the section called “The Editing Pane”.