<varlistentry>
<term><option>--slice=</option></term>
- <listitem><para>Make the new <filename>.service</filename> or <filename>.scope</filename> unit part of the
- specified slice, instead of <filename>system.slice</filename>.</para>
+ <listitem><para>Make the new <filename>.service</filename> or <filename>.scope</filename> unit part
+ of the specified slice, instead of <filename>system.slice</filename> (when running in
+ <option>--system</option> mode) or the root slice (when running in <option>--user</option>
+ mode).</para>
</listitem>
</varlistentry>