+<?xml version="1.0"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
+
+<refsect1>
+ <title>Environment</title>
+
+ <variablelist class='environment-variables'>
+ <varlistentry>
+ <term><varname>$SYSTEMD_PAGER</varname></term>
+
+ <listitem><para>Pager to use when
+ <option>--no-pager</option> is not given;
+ overrides <varname>$PAGER</varname>. Setting
+ this to an empty string or the value
+ <literal>cat</literal> is equivalent to passing
+ <option>--no-pager</option>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$SYSTEMD_LESS</varname></term>
+
+ <listitem><para>Override the default
+ options passed to
+ <command>less</command>
+ (<literal>FRSXMK</literal>).</para></listitem>
+ </varlistentry>
+ </variablelist>
+</refsect1>