<refsection><info><title>Description</title></info>
-<para>Double-sided documents are printed with a slightly wider margin
-on the binding edge of the page.
+<para>This parameter is useful when printing a document
+on both sides of the paper.</para>
+
+<para>if set to non-zero, documents are formatted using different page-masters
+for odd and even pages. These can differ by using a slightly wider margin
+on the binding edge of the page, and alternating left-right
+positions of header or footer elements.
</para>
-<para>FIXME: The current set of parameters does not take writing direction
-into account.</para>
+
+<para>If set to zero (the default), then only the 'odd' page masters
+are used for both even and odd numbered pages.</para>
+
+<para>See also <parameter>force.blank.pages</parameter>,
+<parameter>page.margin.inner</parameter> and
+<parameter>page.margin.outer</parameter>.</para>
</refsection>
</refentry>
The value is normally taken from the gentext file for the
lang attribute of the document's root element, using the
key name 'writing-mode' to look it up in the gentext file.
-But the param can also be
+But this param can also be
set on the command line to override that gentext value.
</para>
<para>Accepted values are: