+.IP "\fB\-\-in\-place[=\fR\fI\s-1SUFFIX\s0\fR\fB]\fR \fB\-\-overwrite[=\fR\fI\s-1SUFFIX\s0\fR\fB]\fR" 4
+.IX Item "--in-place[=SUFFIX] --overwrite[=SUFFIX]"
+Overwrite \fBoriginal\fR listed files by filtered result.
+.Sp
+\&\fBNote\fR \-\-overwrite preserves timestamps of original files.
+.IP "\fB\-\-guess=[12]\fR" 4
+.IX Item "--guess=[12]"
+Print guessed encoding and newline. (2 is default, 1 is only encoding)
+.IP "\fB\-\-help\fR" 4
+.IX Item "--help"
+Print nkf's help.
+.IP "\fB\-\-version\fR" 4
+.IX Item "--version"
+Print nkf's version.