Hi,
looking at the chapter "6 Graphs and plots", it seems to me that the
sub-section "Publication-quality graphics: advanced options" (within
6.1) is quite outdated. It talks of sizes and terminals and so on which
you haven't really had to touch at least for a couple of years. For PDF
output we have another GUI controller which does all that, and
hand-picking gnuplot terminals is not recommended, I believe.
Just adding another screenshot of the PDF controller window would be
enough to replace that sub-section, I think.
As a cosmetic aside, the picture 6.1 could be updated, the window
decorations look 20 years old. (That's probably true for other
screenshots as well, though...)
cheers
sven