Minimal commit for Paul.

[ardour-manual-diverged] / _manual / 02_introducing-ardour / 03_basic-gui-operations / 04_undoredo-for-editing-.html

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----
-layout: default
-title: Undo/Redo for Editing
----
-
-<p>
-  While editing, it happens that you apply an unintended change, or make
-  a choice one that you later decide was wrong. All changes to the
-  arrangement of session components (regions, control points) along the
-  timeline can be <dfn>undone</dfn> (and <dfn>redone</dfn> if necessary).
-</p>
-<p>
-  The default keybindings are <kbd class="mod1">Z</kbd> for Undo and
-  <kbd class="mod1">R</kbd> for Redo. These match the conventions of most
-  other applications that provide undo/redo.
-</p>
-<p>
-  Changes are also saved to the <dfn>session history</dfn> file, so that
-  undo/redo is possible even if you close the session and reopen it later,
-  even if you quit Ardour in between.
-</p>
-<p>
-  The maximum number of changes that can be undone can be configured under
-  <kbd class="menu">Edit &gt; Preferences &gt; Misc &gt; Undo</kbd>.
-  The maximum number of changes stored in the history file is a separate
-  parameter, and can also be set in the same place.
-</p>
-
-<p class="note">
-  In addition to the normal undo (which works only on actions that change
-  the timeline), there is a <dfn>visual undo</dfn> which will revert any
-  command that affects the display of the editor window. Its shortcut is
-  <kbd class="mod3">Z</kbd>.
-  There is also an undo for selection. See
-  <a href="/introducing-ardour/basic-gui-operations/selection-techniques/">Selection Techniques</a> for more information.
-</p>