I have often made use of the
editability of PostScript files to repair, port, and otherwise upgrade
PostScript figure files. I have not had much luck trying to edit PDF
figure files, other than what can be accomplished using Adobe Acrobat
on a Windows system. I should note that, in part for this reason, I have
never actually tried converting my figures to PDF and using
pdflatex. Another reason is that I am quite satisfied with the
results of generating PostScript and converting to PDF.
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