Index: head/usr.bin/id/groups.1
===================================================================
--- head/usr.bin/id/groups.1
+++ head/usr.bin/id/groups.1
@@ -55,5 +55,11 @@
 belong.
 .Sh EXIT STATUS
 .Ex -std
+.Sh EXAMPLES
+Show groups the root user belongs to:
+.Bd -literal -offset indent
+$ groups root
+wheel operator
+.Ed
 .Sh SEE ALSO
 .Xr id 1