@cindex mistakes, correcting
In this chapter we describe commands that are useful when you catch
-a mistake while editing. The most fundamental command for correcting
-erroneous editing is the undo command @kbd{C-/} (which is also bound
-to @kbd{C-x u} and @kbd{C-_}). This undoes a single command, or a
+a mistake while editing. The most fundamental of these commands is
+the undo command @kbd{C-/} (also bound to @kbd{C-x u} and @kbd{C-_}).
+This undoes a single command, or a
part of a command (as in the case of @code{query-replace}), or several
consecutive character insertions. Consecutive repetitions of
@kbd{C-/} undo earlier and earlier changes, back to the limit of the
to @kbd{C-_} because typing @kbd{C-/} on some text terminals actually
enters @kbd{C-_}.}. This undoes the most recent change in the buffer,
and moves point back to where it was before that change.
-
Consecutive repetitions of @kbd{C-/} (or its aliases) undo earlier
and earlier changes in the current buffer. If all the recorded
changes have already been undone, the undo command signals an error.
harmlessly breaks the sequence of undoing; then type @kbd{C-/} to undo
the undo command.
- On the other hand, if you want to resume undoing, without redoing
+ Alternatively, if you want to resume undoing, without redoing
previous undo commands, use @kbd{M-x undo-only}. This is like
@code{undo}, but will not redo changes you have just undone.