about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-3
-Print only NFS v3 statistics.
+Print only NFS v3 statistics. The default is to only print information
+about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-4
-Print only NFS v4 statistics.
+Print only NFS v4 statistics. The default is to only print information
+about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-m, \-\-mounts
Print information about each of the mounted \fBNFS\fR file systems.