Index: head/usr.sbin/pw/pw.8
===================================================================
--- head/usr.sbin/pw/pw.8
+++ head/usr.sbin/pw/pw.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd December 10, 2017
+.Dd February 8, 2019
 .Dt PW 8
 .Os
 .Sh NAME
@@ -979,6 +979,12 @@
 .Bd -literal -offset indent
 pw userdel -n gsmith -r
 .Ed
+.Pp
+Add the existing user foo to the wheel group,
+in addition to the other groups foo is already a member of.
+.Bd -literal -offset indent
+pw groupmod wheel -m foo
+.Ed
 .Sh EXIT STATUS
 The
 .Nm