\
psfrag{PS text}{Repl text}
, which instructs
the system to replace the original (“PS
”) text with the
TeX-typeset replacement text. Optional
arguments permit adjustment of position, scale and rotation; full
details may be found in pfgguide in the distribution.
Since psfrag works in terms of (encapsulated) PostScript files,
it needs extra work for use with PDFLaTeX. The
pst-pdf package can support such
usage. In fact, the pst-pdf support package
auto-pst-pdf offers a configuration setting precisely for
use with psfrag.
On the other hand,
VTeX’s GeX processor
explicitly deals with psfrag, both in its free and
commercial instances.
The psfragx package goes one step further than
psfrag: it provides a means whereby you can put the
psfrag commands into the preamble of your EPS file
itself. Psfrag has such a command itself, but deprecates
it; psfragx has cleaned up the facility, and provides a
script laprint for use with Matlab to produce
appropriately tagged output. (In principle, other graphics
applications could provide a similar facility, but apparently none does.)
Emacs users may find the embedded editor iTe a
useful tool for placing labels: it’s a (La)TeX-oriented graphical
editor written in Emacs Lisp. You create
iteblock
environments containing graphics and text, and
may then invoke iTe to arrange the elements relative to one
another.
Another useful approach is overpic, which overlays a
picture
environment on a graphic included by use of
\
includegraphics
. This treatment lends itself to ready placement
of texts and the like on top of a graphic. The package can draw a
grid for planning your “attack”; the distribution comes with simple
examples.
Pstricks can of course do everything that overpic
can, with all the flexibility of PostScript programming that it offers
The pstricks web site has a page with several
examples of labelling
which will get you started; if pstricks is
an option for you, this route is worth a try.
The confident user may, of course, do the whole job in a picture
environment which itself includes the graphic. I would recommend
overpic or the pstricks approach, but such things
are plainly little more than a convenience over what is achievable
with the do-it-yourself approach.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=labelfig