Changes: Undo and Redo

Latest revision as of 22:53, 28 October 2020

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created 2001 · complexity basic · version 6.0

To undo recent changes, from normal mode use the undo command:

u: undo last change (can be repeated to undo preceding commands)
Ctrl-r: Redo changes which were undone (undo the undos). Compare to . to repeat a previous change, at the current cursor position. Ctrl-r (hold down Ctrl and press r) will redo a previously undone change, wherever the change occurred.

A related command is:

U: return the last line which was modified to its original state (reverse all changes in last modified line)

U is not actually a true "undo" command as it does not actually navigate undo history like u and Ctrl-r. This means that (somewhat confusingly) U is itself undo-able with u; it creates a new change to reverse previous changes.

U is seldom useful in practice, but is often accidentally pressed instead of u, so it is good to know about.

Undo Tree[]

Note that unlike most programs which maintain a linear undo history, Vim maintains an undo tree containing every edit made to a buffer. To learn how to use Vim's undo tree, see the separate article on using undo branches.

References[]

Comments[]

:nnoremap U :echo " < < ===== C H E C K   C A P S   L O C K ===== > > "<CR>

@@ Line 11: / Line 11: @@
 |category2=Undo
 }}
-To undo recent changes, use the undo command:
+To undo recent changes, from normal mode use the undo command:
 *<code>u</code>: undo last change (can be repeated to undo preceding commands)
-*<code>Ctrl-R</code>: Redo changes which were undone (undo the undos). Compare to '<code>.</code>' to ''repeat'' a previous change, at the current cursor position. Ctrl-R will redo a previously undone change, wherever the change occurred.
+*<code>Ctrl-r</code>: Redo changes which were undone (undo the undos). Compare to <code>.</code> to ''repeat'' a previous change, at the current cursor position. Ctrl-r (hold down Ctrl and press <code>r</code>) will redo a previously undone change, wherever the change occurred.
 A related command is:
 *<code>U</code>: return the last line which was modified to its original state (reverse all changes in last modified line)
-<code>U</code> is not actually a true "undo" command as it does not actually navigate undo history like <code>u</code> and <code>CTRL-R</code>. This means that (somewhat confusingly) <code>U</code> is itself undo-able with <code>u</code>; it creates a ''new'' change to reverse previous changes.
+<code>U</code> is not actually a true "undo" command as it does not actually navigate undo history like <code>u</code> and <code>Ctrl-r</code>. This means that (somewhat confusingly) <code>U</code> is itself undo-able with <code>u</code>; it creates a ''new'' change to reverse previous changes.
 <code>U</code> is seldom useful in practice, but is often accidentally pressed instead of <code>u</code>, so it is good to know about.
-==See also==
+==Undo Tree==
-*[[Recover from accidental Ctrl-U]], which explains what constitutes a '''change''' which can be undone.
+Note that unlike most programs which maintain a linear undo history, Vim maintains an undo ''tree'' containing every edit made to a buffer. To learn how to use Vim's undo tree, see the separate article on [[using undo branches]].
-*[[Using undo branches]], which explains Vim's unique and very powerful '''undo tree'''.
 ==References==
 *{{help|undo}}
+*{{help|U}}
 ==Comments==
+<pre>
-<code>Ctrl-R</code> means to hold down the <code>Ctrl</code> key then press the <code>R</code> key. Note that you do not press the <code>Shift</code> key. Vim documentation uses traditional computer terminology including CTRL-R. In keeping with a more modern approach, we generally use "Ctrl" rather than "CTRL" on this wiki. The tips are not entirely consistent regarding whether to write Ctrl-R or Ctrl-r, but mostly Ctrl-R is preferred. [[User:JohnBeckett|JohnBeckett]] 10:04, March 18, 2010 (UTC)
+:nnoremap U :echo " < < ===== C H E C K   C A P S   L O C K ===== > > "<CR>
+</pre>