diff --git a/usr.sbin/nfsd/nfsd.8.sav b/usr.sbin/nfsd/nfsd.8
--- a/usr.sbin/nfsd/nfsd.8.sav
+++ b/usr.sbin/nfsd/nfsd.8
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd May 30, 2025
+.Dd December 23, 2025
 .Dt NFSD 8
 .Os
 .Sh NAME
@@ -46,13 +46,52 @@
 .Sh DESCRIPTION
 The
 .Nm
-utility runs on a server machine to service NFS requests from client machines.
+utility runs on a server machine to service NFSv4 and/or NFSv3 requests from client machines.
 At least one
 .Nm
 must be running for a machine to operate as a server.
 .Pp
 Unless otherwise specified, eight servers per CPU for UDP transport are
 started.
+.Pp
+The
+.Nm
+server may be configured to serve NFSv3, NFSv4 or both of them.
+When
+nfs_server_enable="YES"
+is set in
+.Xr rc.conf 5 ,
+.Nm
+is configured for NFSv3 only, by default.
+To configure the
+.Nm
+to serve NFSv4, you must also:
+.sp
+.Bl -bullet -compact
+.It
+Add a
+.Dq V4:
+line to
+.Xr exports 5 .
+(This is needed as well as either the ZFS sharenfs property
+or an exports line for each exported file system.)
+.It
+Either choose to do uids in
+.Dq strings ,
+which is probably
+the easiest unless you are doing kerberos mounts or
+run nfsuserd (but choose one, not both of these).
+Setting vfs.nfs.enable_uidtostring and vfs.nfsd.enable_stringtouid
+to one and not running the nfsuserd chooses uids in
+.Dq strings .
+.It
+Set nfsv4_server_enable="YES" in
+.Xr rc.conf 5
+or set nfsv4_server_only="YES" in
+.Xr rc.conf 5
+if you do not want NFSv3 to be served.
+.El
+.sp
 .Pp
 When
 .Nm
@@ -336,6 +375,7 @@
 .Xr pnfs 4 ,
 .Xr pnfsserver 4 ,
 .Xr exports 5 ,
+.Xr rc.conf 5 ,
 .Xr stablerestart 5 ,
 .Xr gssd 8 ,
 .Xr ipfw 8 ,