標準フォント: set size 0.7,1.4; set term post portrait color "Times-Roman" 14

Fonts listed by `fontfile` or `fontfile add` encapsulate the font
definitions of the listed font from a postscript Type 1 or TrueType font
file directly into the gnuplot output postscript file. Thus, the enclosed
font can be used in labels, titles, etc. See the section
`postscript fontfile` for more details. With `fontfile delete`, a fontfile
is deleted from the list of embedded files. `nofontfiles` cleans the list
of embedded fonts.