sinta1

Syntax:
set key { left | right | top | bottom | outside | below

| <position>}
{Left | Right} {{no}reverse}
{samplen <sample_length>} {spacing <vertical_spacing>}
{width <width_increment>}
{title "<text>"}
{{no}box { {linestyle | ls <line_style>}
| {linetype | lt <line_type>}
{linewidth | lw <line_width>}}}
set nokey
show key

set xrange [-10:10]
set yrange [-2:2]
plot sin(x)
pause -1

set key left 2,2 bottom box
plot cos(x)
pause -1

set key right 2,2 left top nobox
plot x
pause -1

set key left 2,2 outside box
plot cos(x)
pause -1

set key left 2,2 below box
plot cos(x)
pause -1

set xrange [-10:10]
set yrange [-2:2]
set key left 4,4 left reverse
plot sin(x),cos(x)
pause -1
set key left 4,4 left noreverse box
replot x
pause -1