.IP "\fB-r\fP" 10
remove duplicated lines
.IP "\fB-c <fg modeline> <bg modeline> <fg highlight> <bg highlight>\fP" 10
-select the display colors for the modeline and the highlighted line
+select the modline and highlight color numbers
.IP "\fB-o <output filename>\fP" 10
write the selected line into the specified file
.IP "\fB-s <pattern separator>\fP" 10