+Tektronix 4014 and 4015 terminals with the Enhanced Graphics Module (Use
+.B \-l4013
+for 4014's or 4015's without the Enhanced Graphics Module)
+.br
+.ns
+.TP
+.B \-lplotaed
+AED 512 color graphics terminal
+.br
+.ns
+.TP
+.B \-lplotbg
+BBN bitgraph graphics terminal
+.br
+.ns
+.TP
+.B \-lplotdumb
+Dumb terminals without cursor addressing or line printers
+.br
+.ns
+.TP
+.B \-lplot
+DEC Gigi terminals
+.br
+.ns
+.TP
+.B \-lvt0
+DEC vt100 terminals
+.br
+.ns
+.TP
+.B \-lplot2648
+Hewlett Packard 2648 graphics terminal
+.br
+.ns
+.TP
+.B \-lplot7221
+Hewlett Packard 7221 graphics terminal
+.br
+.ns
+.TP
+.B \-lplotimagen
+Imagen laser printer (default 240 dots-per-inch resolution).
+.PP
+On many devices, it is necessary to pause after
+.IR erase (),
+otherwise plotting commands are lost.
+The pause is normally done by the tty driver if at login time,
+.I tset
+found a
+.I df
+field in the
+.IR termcap (5)
+entry for the terminal.
+If a pause is needed but not automatically being generated,
+add
+.RS
+.nf
+flush(stdout);
+sleep(1);
+.fi
+.RE
+after each
+.IR erase ().