# The entire format file is scanned, so the x axis title is
# rendered in the font specified by the "sf t" option below.
x Time (seconds)

# Specify black 24-point Helvetica Bold for the "t" fontgroup.
# Although black is the default color, it needs to be specified
# explicitly (see below).
sf t Fh-b,P24,Cblack

# Specify red for the "p" fontgroup.
sf p Cred

# Here, a transient fontgroup modification (P/2) overrides the
# previously defined point size setting for the "t" font, so
# that the y axis title is rendered half as large as the
# (unscaled) x axis title.
y (P/2) Amplitude

# As shown in the previous line, if the argument following
# an option begins with "(", it is interpreted as a local
# fontgroup spec.  In order to use a string beginning with
# "(" as a string argument, it is necessary to quote it:
t "(Noisy) Sinusoid"
# Note that this title is rendered in 24-point type;  the
# effect of the local spec used earlier is limited to the
# line on which it appeared.

# Here, we make two plots, first a normal plot using the
# "p" fontgroup (in red), then a scatter plot using triangles.
# The effect of the "(t)" is to specify that the "t" fontgroup
# must be used for the second plot;  thus the triangles are
# black, not red, and are sized to match the 24-point type of
# fontgroup "t".
p 0,1n(p) 0,1Striangle(t)
# If, however, the color had not been specified explicitly
# for fontgroup "t", plt would not change the color between
# plots, and the triangles would be rendered in red.