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## 16 Commands for Fixing Typos

In this chapter we describe commands that are useful when you catch a mistake while editing. The most fundamental of these commands is the undo command `C-/` (also bound to `C-x u` and `C-_`). This undoes a single command, or a part of a command (as in the case of `query-replace`), or several consecutive character insertions. Consecutive repetitions of `C-/` undo earlier and earlier changes, back to the limit of the undo information available.

Aside from the commands described here, you can erase text using deletion commands such as `DEL` (`delete-backward-char`). These were described earlier in this manual. See Erasing.