Syntax:
set terminal {<terminal-type>}
show terminal
If <terminal-type> is omitted, gnuplot will list the available terminal types. <terminal-type> may be abbreviated.
If both set terminal and set output are used together, it is safest to give set terminal first, because some terminals set a flag which is needed in some operating systems.
Several terminals have additional options. For example, see dumb, iris4d, hpljii or postscript.
This document may describe drivers that are not available to you because they
were not installed, or it may not describe all the drivers that are available
to you, depending on its output format.