.RB [ \-nowhatnowproc ]
.RB [ \-atfile ]
.RB [ \-noatfile ]
+.RB [ \-fmtproc
+.IR program ]
+.RB [ \-nofmtproc ]
.RB [ \-build ]
.RB [ \-file
.IR msgfile ]
.PP
See the
.BR mhl(1)
-documentation for more information.
+documentation for more information. The format program can be changed by
+the
+.B \-fmtproc
+.I program
+and
+.B \-nofmtproc
+switches.
.PP
To use the MIME rules for encapsulation, specify the
.B \-mime