Call: PLOT_COMMENT
The location should be given in the format:
`h-v`
Where
h = LEFT or RIGHT
v = UP or DOWN
The string to be plotted, this string can be up to 80 characters
long but shorters strings are recommened so as to avoid overflow
of the comment areas on the left into those on the right.
The comment string is plotted with representation
COMMENT.
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Formatted on 0099-12-08 at 15:53.