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                <h1>
                    Change pixel dimensions of an image
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                <div><div class="section"><p>Changing an image’s pixel dimensions affects
not only its on‑screen size but also its image quality and its printed
characteristics—either its printed dimensions or its image resolution. </p>
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<ol><li class="stepexpand"><span>Choose Image&#160;&gt; Image Size.</span></li>
<li class="stepexpand"><span>To maintain the current ratio of pixel width to pixel
height, select Constrain Proportions. This option automatically
updates the width as you change the height, and vice versa.</span></li>
<li class="stepexpand"><span>Under Pixel Dimensions, enter values for Width and Height.
To enter values as percentages of the current dimensions, choose
Percent as the unit of measurement. The new file size for the image
appears at the top of the Image Size dialog box, with the old file
size in parentheses.</span></li>
<li class="stepexpand"><span>Make sure that Resample Image is selected, and choose
an interpolation method.</span></li>
<li class="stepexpand"><span>If your image has layers with styles applied to them,
select Scale Styles to scale the effects in the resized image. This
option is available only if you selected Constrain Proportions.</span></li>
<li class="stepexpand"><span>When you finish setting options, click&#160;OK.</span> <div class="tip"><img src="images/tip_help.png" />For best results when you produce a smaller
image, downsample and apply the Unsharp Mask filter. To produce
a larger image, rescan the image at a higher resolution.</div></li>
</ol>
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