--- a/src/doc/user/usermanual.sgml
+++ b/src/doc/user/usermanual.sgml
@@ -2123,6 +2123,17 @@
<literal>dir:share/doc</literal> would match either
<filename>/usr/share/doc</filename> or
<filename>/usr/local/share/doc</filename> </para>
+ </listitem>
+
+ <listitem><para><literal>size</literal> for filtering the
+ results on file size. Exemple:
+ <literal>size<10000</literal>. You can use
+ <literal><</literal>, <literal>></literal> or
+ <literal>=</literal> as operators. You can specify a range like the
+ following: <literal>size>100 size<1000</literal>. The usual
+ <literal>k/K, m/M, g/G, t/T</literal> can be used as (decimal)
+ multipliers. Ex: <literal>size>1k</literal> to search for files
+ bigger than 1000 bytes.</para>
</listitem>
<listitem><para><literal>date</literal> for searching or filtering