Syntax:
set terminal aqua {<n>} {title "<wintitle>"} {size <x> <y>} {font "<fontname>{,<fontsize>}"} {linewidth <lw>}"} {{no}enhanced} {solid|dashed} {dl <dashlength>}}
where n is the number of the window to draw in (default is 0), wintitle is the name shown in the title bar (default "Figure n"), x y is the size of the plot (default is 846x594 pt = 11.75x8.25 in).
Use fontname to specify the font (default is "Times-Roman"), and fontsize to specify the font size (default is 14.0 pt).
The aqua terminal supports enhanced text mode (see enhanced (p. )), except for
overprint. Font support is limited to the fonts available on the system.
Character encoding can be selected by set encoding and currently supports
iso_latin_1, iso_latin_2, cp1250, and UTF8 (default).
Lines can be drawn either solid or dashed, (default is solid) and the dash spacing can be modified by dashlength which is a multiplier 0.