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Following the NAMELIST are six title lines, each up to 500 characters
long.
1) Graph title,
2) X-axis title,
3) Y-axis title,
4) Z-axis title,
5) U-axis title,
6) V-axis title.
The last non-blank character in each title will be used to determine
the title length, and the resulting string will then be centered on the
plot. Lower-case letters may be used in titles, if they are available.
Otherwise, they can be obtained by using the case switch characters,
"<" and ">" (left and right angle brackets), which convert following
letters to upper and lower case respectively. A doubled switch
character suppresses its interpretation as a case switch, and causes it
to be collapsed to a single character which is displayed in the plotted
string. Multiple line titles can be obtained by separating the line
strings by the two-character sequence $N or $n. Thus, if the graph
title line supplied is
Label 1$NLabel 2$NLabel 3
then the graph title will be three centered lines:
Label 1
Label 2
Label 3
When multiple-line titles are requested, it will usually e necessary to
reduce the horizontal and vertical extent of the plot through the
options HSCALE and VSCALE in order to make the margins sufficiently
large for the title text.