.IR file ]
.RB [ \-t
.IR title ]
+.RB [ \-T
+.IR title ]
.RB [ \-l
.IR line ]
.RB [ \-w
.IR file ]
.RB [ \-t
.IR title ]
-.RB [ \-l
-.IR line ]
+.RB [ \-T
+.IR title ]
.RB [ \-w
.IR windowid ]
.RB [ \-v ]
-.RB [ \-l
-.IR line ]
+.RB \-l
+.IR line
.RI [ stty_args ...]
.SH DESCRIPTION
.B st
.BI \-t " title"
defines the window title (default 'st').
.TP
+.BI \-T " title"
+defines the window title (default 'st').
+.TP
.BI \-w " windowid"
embeds st within the window identified by
.I windowid
.TP
.BI \-l " line"
-use a tty line instead of a pseudo terminal.
-When this flag is used
-remaining arguments are used as flags for stty.
+use a tty
+.I line
+instead of a pseudo terminal.
+.I line
+should be a (pseudo-)serial device (e.g. /dev/ttySO on Linux for serial port
+0).
+When this flag is given
+remaining arguments are used as flags for
+.BR stty(1).
+By default st initializes the serial line to 8 bits, no parity, 1 stop bit
+and a 38400 baud rate. The speed is set by appending it as last argument
+(e.g. 'st -l 115200'). Arguments before the last one are
+.BR stty(1)
+flags. If you want to set odd parity on 115200 baud use for example 'st -l
+parenb parodd 115200'. Set the number of bits by using for example 'st -l cs7
+115200'. See
+.BR stty(1)
+for more arguments and cases.
.TP
.B \-v
prints version information to stderr, then exits.