lista2

set xrange [-10:10];set yrange [-2:2]
set key left bottom Left title 'titolo ' box 3
plot sin(x)
pause -1

. # default o set key
set xrange [-10:10];set yrange [-2:2]
set key right top Right noreverse samplen 4 spacing 1.25 title "" nobox
plot cos(x)
pause -1

set xrange [-10:10];set yrange [-2:2]
set key right top Right reverse samplen 4 spacing 1.25 title " titolo "box
plot cos(x)
pause -1

set xrange [-10:10];set yrange [-2:2]
set key
plot cos(x)
pause -1