set hershey on | off
This command, which is available beginning with grads version 2.1,
is a quick shortcut for users who would like to take advantage of Cairo
fonts but do not know anything about font files on their system or do
not want to bother editing the font controls in existing scripts.
'set hershey off' will tell grads to use generic
Cairo fonts that are reasonable approximations of Hershey fonts 0, 1, 2,
4, and 5. Font 3 is the Greek (symbol) font, and cannot be duplicated
with generic controls.
'set hershey on' will return grads to the use of traditional Hershey fonts.