The amount of the graph that the plot takes up may be controlled to
some extent with the set offsets command. This command takes four
offset arguments: <left>, <right>, <top> and <bottom>. By default,
each offset is 0. Each offset may be a constant or an expression. Left
and right offsets are given in units of the x axis, while top and
bottom offsets are given in units of the y axis. The plot of sin(x),
displayed with offsets of 0, 0, 2, 2 will take up 1/3 of the
displayed y axis. Offsets are particularly useful with polar
coordinates as a means of compensating for aspect ratio distortion.
Offsets are ignored in splots.
Syntax:
set offsets <left>, <right>, <top>, <bottom>
show offsets