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Previous: <a rel="previous" accesskey="p" href="Image-Syntax.html#Image-Syntax">Image Syntax</a>,
Up: <a rel="up" accesskey="u" href="Images.html#Images">Images</a>
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<h4 class="subsection">12.2.2 Image Scaling</h4>
<p><a name="index-Images_002c-scaling-593"></a><a name="index-Scaling-images-594"></a><a name="index-Width-of-images-595"></a><a name="index-Height-of-images-596"></a><a name="index-Aspect-ratio-of-images-597"></a><a name="index-Distorting-images-598"></a>The optional <var>width</var> and <var>height</var> arguments to the
<code>@image</code> command (see the previous section) specify the size to
scale the image to. They are ignored for Info output. If neither is
specified, the image is presented in its natural size (given in the
file); if only one is specified, the other is scaled proportionately;
and if both are specified, both are respected, thus possibly distorting
the original image by changing its aspect ratio.
<p><a name="index-Dimensions-and-image-sizes-599"></a>The <var>width</var> and <var>height</var> may be specified using any valid TeX
dimension, namely:
<dl>
<dt>pt<dd><a name="index-Points-_0028dimension_0029-600"></a>point (72.27pt = 1in)
<br><dt>pc<dd><a name="index-Picas-601"></a>pica (1pc = 12pt)
<br><dt>bp<dd><a name="index-Big-points-602"></a>big point (72bp = 1in)
<br><dt>in<dd><a name="index-Inches-603"></a>inch
<br><dt>cm<dd><a name="index-Centimeters-604"></a>centimeter (2.54cm = 1in)
<br><dt>mm<dd><a name="index-Millimeters-605"></a>millimeter (10mm = 1cm)
<br><dt>dd<dd><a name="index-Did_0040_005eot-points-606"></a>didôt point (1157dd = 1238pt)
<br><dt>cc<dd><a name="index-Ciceros-607"></a>cicero (1cc = 12dd)
<br><dt>sp<dd><a name="index-Scaled-points-608"></a>scaled point (65536sp = 1pt)
</dl>
<p><a name="index-ridt_002eeps-609"></a>For example, the following will scale a file <samp><span class="file">ridt.eps</span></samp> to one
inch vertically, with the width scaled proportionately:
<pre class="example"> @image{ridt,,1in}
</pre>
<p><a name="index-epsf_002etex-610"></a>For <code>@image</code> to work with TeX, the file <samp><span class="file">epsf.tex</span></samp> must be
installed somewhere that TeX can find it. (The standard location is
<samp><var>texmf</var><span class="file">/tex/generic/dvips/epsf.tex</span></samp>, where <var>texmf</var> is a
root of your TeX directory tree.) This file is included in the
Texinfo distribution and is also available from
<a href="ftp://tug.org/tex/epsf.tex">ftp://tug.org/tex/epsf.tex</a>, among other places.
<p><code>@image</code> can be used within a line as well as for displayed
figures. Therefore, if you intend it to be displayed, be sure to leave
a blank line before the command, or the output will run into the
preceding text.
<p>Image scaling is presently implemented only in TeX, not in HTML or
any other sort of output.
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