+.TP
+\fB-d\fR, \fB--remove-duplicates\fR
+remove duplicated lines (note that you can have two different lines
+with the same visible part if you use the -x option)
+.TP
+\fB-e\fR, \fB--regexp\fR
+start in regexp mode
+.TP
+\fB-a\fR, \fB--case-sensitive\fR
+start in case sensitive mode
+.TP
+\fB-u\fR, \fB--upper-case-makes-case-sensitive\fR
+using an upper case in the matching string makes the matching
+case-sensitive
+.TP
+\fB-n\fR, \fB--exclamation-negates\fR
+substrings starting with an exclamation mark must be absent for a line
+to match
+.TP
+\fB-q\fR, \fB--no-beep\fR