3 title: Undo/Redo for Editing
7 While editing, it happens that you apply an unintended change, or make
8 a choice one that you later decide was wrong. All changes to the
9 arrangement of session components (regions, control points) along the
10 timeline can be <dfn>undone</dfn> (and <dfn>redone</dfn> if necessary).
13 The default keybindings are <kbd class="mod1">Z</kbd> for Undo and
14 <kbd class="mod1">R</kbd> for Redo. These match the conventions of most
15 other applications that provide undo/redo.
18 Changes are also saved to the <dfn>session history</dfn> file, so that
19 undo/redo is possible even if you close the session and reopen it later,
20 even if you quit Ardour in between.</p>
22 The maximum number of changes that can be undone can be configured under
23 <kbd class="menu">Edit > Preferences > Misc > Undo</kbd>.
24 The maximum number of changes stored in the history file is a separate
25 parameter, and can also be set in the same place.