> (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 and whether undos are reset when a buffer is saved can be changed in the pane of the > dialog box; see Section 8.3.6, “The Editing Pane”.