Syntax:
set terminal windows {color | monochrome} {enhanced | noenhanced} {{font} "fontname{,fontsize}" {<fontsize>}}
where color and monochrome select colored or mono output,
enhanced enables enhanced text mode features (subscripts,
superscripts and mixed fonts). See enhanced (p. ) for more information.
"4#4fontname5#5" is the name of a valid Windows font, and 4#4fontsize5#5
is the size of the font in points.
Other options may be set with the graph-menu or the initialization file.
The Windows version normally terminates immediately as soon as the end of
any files given as command line arguments is reached (i.e. in non-interactive
mode), unless you specify - as the last command line option.
It will also not show the text-window at all, in this mode, only the plot.
By giving the optional argument -persist (same as for gnuplot under x11;
former Windows-only options /noend or -noend are still accepted as well),
will not close gnuplot. Contrary to gnuplot on other operating systems,
gnuplot's interactive command line is accessible after the -persist option.