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            <div class="Photoshop"><table><tr><td class="banner">Adobe Photoshop CS4</td><td class="pod"><img src="images/PDF.gif" width="16" height="16" hspace="15" valign="50%" />&#160;&#160;
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<ul class="navigation"><li class="prev"><a accesskey="p" class="prev" href="WSB3154840-1191-47b7-BA5B-2BD8371C31D8a.html" title="Nondestructive editing"><img src="images/blank.gif" alt="Previous" width="17" height="17" /></a></li><li class="next"><a accesskey="n" class="next" href="WSCCBCA4AB-7821-4986-BC03-4D1045EF2A57a.html" title="About Smart Objects"><img src="images/blank.gif" alt="Next" width="17" height="17" /></a></li></ul><div class="hierarchy" id="hierarchy"><a href="WSfd1234e1c4b69f30ea53e41001031ab64-78e4a.html">Layers</a> /
     <a href="WSB3154840-1191-47b7-BA5B-2BD8371C31D8a.html"><b>Nondestructive editing</b></a> 
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                <h1>
                    About nondestructive editing
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                <div><p>Nondestructive
editing allows you to make changes to an image without overwriting
the original image data, which remains available in case you want
to revert to it. Because nondestructive editing doesn’t remove data
from an image, the image quality doesn’t degrade when you make edits.
You can perform nondestructive editing in Photoshop in several ways:</p>
<div class="para"><dl><dt class="dlterm">Working with adjustment layers</dt>
<dd>Adjustment layers apply color and tonal adjustments to an
image without permanently changing pixel values. </dd><p class="dlseparator"></p><dt class="dlterm">Transforming with Smart Objects</dt>
<dd>Smart Objects enable nondestructive scaling, rotating, and
warping. </dd><p class="dlseparator"></p><dt class="dlterm">Filtering with Smart Filters</dt>
<dd>Filters applied to Smart Objects become Smart Filters and
allow for nondestructive filter effects. </dd><p class="dlseparator"></p><dt class="dlterm">Adjusting variations, shadows, and highlights with
Smart Objects</dt>
<dd>Shadow/Highlight and Variations commands can be applied to
a Smart Object as Smart Filters. </dd><p class="dlseparator"></p><dt class="dlterm">Retouching on a separate layer</dt>
<dd>Clone Stamp, Healing Brush, and Spot Healing Brush tools
let you retouch nondestructively on a separate layer. Be sure to
select Sample All Layers from the options bar (select Ignore Adjustment
Layers to ensure that adjustment layers won’t affect the separate
layer twice). You can discard unsatisfactory retouching, if necessary. </dd><p class="dlseparator"></p><dt class="dlterm">Editing in Camera Raw</dt>
<dd>Adjustments to batches of raw, JPEG, or TIFF images preserve
the original image data. Camera Raw stores adjustment settings on
a per-image basis separately from the original image files. </dd><p class="dlseparator"></p><dt class="dlterm">Opening Camera Raw files as Smart Objects</dt>
<dd>Before you can edit Camera Raw files in Photoshop, you must
configure settings for them with Camera Raw. Once you edit a Camera
Raw file in Photoshop, you can’t reconfigure Camera Raw settings
without losing the changes. Opening Camera Raw files in Photoshop
as Smart Objects enables you to reconfigure Camera Raw settings
at any time, even after you edit the file.</dd><p class="dlseparator"></p><dt class="dlterm">Cropping nondestructively</dt>
<dd>After you create a cropping rectangle with the Crop tool,
select Hide from the options bar to preserve the cropped area in
a layer. Restore the cropped area anytime by choosing Image&#160;&gt;
Reveal All or by dragging the Crop tool beyond the edge of the image.
The Hide option is unavailable for images that contain only a background
layer. </dd><p class="dlseparator"></p><dt class="dlterm">Masking</dt>
<dd>Layer and vector masks are nondestructive because you can
re‑edit the masks without losing the pixels they hide. Filter masks
let you mask out the effects of Smart Filters on Smart Object layers.</dd><p class="dlseparator"></p></dl>
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                    <div><p><a href="WS2CB27D80-91BE-42ce-A0E7-2A908D6F2C8B.html">About Camera Raw</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-787aa.html">About adjustment layers and fill layers</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-7636a.html">Crop images</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-7866a.html">About layer and vector masks</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-760aa.html">Retouch with the Clone Stamp tool</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-7607a.html">Retouch with the Healing Brush tool</a></p><p><a href="WSfd1234e1c4b69f30ea53e41001031ab64-7605a.html">Retouch with the Spot Healing Brush tool</a></p>
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