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        <h1>

          Revert to history states and snapshots

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        <div><p>While

the Undo and Redo commands restrict you to an incremental sequence

of changes, the History panel lets you instantly revert back to

any previous change. Use the panel to quickly compare processed

and original audio or discard a series of changes that produced

undesired results.</p>

<p>History states disappear when you reopen a file, but if you save

to Adobe Sound (ASND) format, you can always revert to history snapshots.</p>

<div class="note"><span class="notetitle">Note:  </span>When you work with very large audio files, delete unnecessary

history states and snapshots to clear disk space and improve performance.</div>

<div class="section"><h4 class="sectiontitle">Revert to states</h4><ul><li><p>To revert to

any history state, click it.</p>

</li>

<li><p>To incrementally move through states, either press the up

and down arrows on the keyboard, or choose Step Backward or Step

Forward from the panel menu. </p>

</li>

</ul>

</div>

<div class="section"><h4 class="sectiontitle">Delete states</h4><ul><li><p>To delete all states,

choose Clear History from the panel menu.</p>

</li>

<li><p>To delete a specific state, select it, and then click the

trash icon&#160;<img src="images/trash_icon.png" />.</p>

</li>

</ul>

<div class="note"><span class="notetitle">Note:  </span>Deleting

history states also removes related Undo commands.</div>

</div>

<div class="section"><h4 class="sectiontitle">Create a snapshot</h4><p>When audio content is

in a state you might want to return to, create a snapshot, and save

in ASND format.</p>

<ol><li><p>In the History panel, click the Snapshots

icon&#160;<img src="images/snapshots.png" />, and

select New Snapshot.</p>

</li>

<li><p>Enter a name, and click OK.</p>

<div class="tip"><img src="images/tip_help.png" />To change

a snapshot name, repeat step 1, and select Rename Snapshot.</div></li>

</ol>

</div>

<div class="section"><h4 class="sectiontitle">Revert to a snapshot</h4><p><img src="images/dingbat.png" />&#160;In the History

panel, click the Snapshots icon&#160;<img src="images/snapshots.png" />, and

select the snapshot name.</p>

</div>

<div class="section"><h4 class="sectiontitle">Delete a snapshot</h4><ol><li><p>In the History

panel, click the Snapshots icon&#160;<img src="images/snapshots.png" />, and

select Delete Snapshot.</p>

</li>

<li><p>Select the snapshot from the Name menu, and click OK.</p>

</li>

</ol>

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          <div id="relatedlinkinfo">More Help topics</div><div><p><a href="WS4BDD89AB-2242-4354-BDFB-CE821843B437a.html">Choosing an audio file format</a></p><p><a href="WSBEBF40DC-8BB0-41cc-AEB8-5F553CF2C828.html">Saving and mixing down multitrack files</a></p>

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