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