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+<head>
+<title>UK TeX FAQ -- question label gutter</title>
+</head><body>
+<h3>Why is the inside margin so narrow?</h3>
+<p/>If you give the standard classes the <code>twoside</code> option, the
+class sets the margins narrow on the left of odd-numbered pages, and
+on the right of even-numbered pages. This is often thought to look
+odd, but it is quite right.
+<p/>The idea is that the typographic urge for symmetry should also apply
+to margins: if you lay an even numbered page to the left of an
+odd-numbered one, you will see that you&rsquo;ve three equal chunks of
+un-printed paper: the left margin of the even page, the right margin
+of the odd page, and the two abutting margins together.
+<p/>This is all very fine in the abstract, but in practical book(let)
+production it only works &ldquo;sometimes&rdquo;.
+<p/>If your booklet is produced on double-width paper and stapled, the
+effect will be good; if your book(let) is produced using a so-called
+&ldquo;perfect&rdquo; binding, the effect will again be good.
+<p/>However, almost any &ldquo;quality&rdquo; book-binder will need some of your
+paper to grab hold of, and a book bound in such a way won&rsquo;t exhibit
+the treasured symmetry unless you&rsquo;ve done something about the margin
+settings.
+<p/>The packages recommended in
+&ldquo;<a href="FAQ-marginpkgs.html">setting up margins</a>&rdquo; mostly have provision for
+a &ldquo;binding offset&rdquo; or a &ldquo;binding correction&rdquo; &mdash; search for
+&ldquo;binding&rdquo; in the manuals (<i>vmargin</i> doesn&rsquo;t help, here).
+<p/>If you&rsquo;re doing the job by hand (see
+<a href="FAQ-marginmanual.html">manual margin setup</a>), the trick is to
+calculate your page and margin dimensions as normal, and then:
+<ul>
+<li> subtract the binding offset from <code>\</code><code>evensidemargin</code>, and
+<li> add the binding offset to <code>\</code><code>oddsidemargin</code>.
+</ul>
+which can be achieved by:
+<blockquote>
+<pre>
+\addtolength{\evensidemargin}{-offset}
+\addtolength{\oddsidemargin}{offset}
+</pre>
+</blockquote><p>
+(substituting something sensible like &ldquo;<code>5mm</code>&rdquo; for
+&ldquo;<code>offset</code>&rdquo;, above).
+<p/>The above may not be the best you can do: you may well choose to
+change the <code>\</code><code>textwidth</code> in the presence of the binding offset; but
+the changes do work for constant <code>\</code><code>textwidth</code>.
+<p/><p/><p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=gutter">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=gutter</a>
+</body>