wolffd@0: --- vladimir@worklogic.com: this below isn't implemented yet! ---
wolffd@0: --- Talk to me if you're interested in it and want to help ---
wolffd@0:                            Latex/Psfrag Attributes+
wolffd@0: Only work in -Tps and if latex2e and psfrag.sty ver.3 are installed.
wolffd@0:   The resulting ps file will print latex commands unless you include it in a
wolffd@0: tex file that does \usepackage[scanall]{psfrag}, or run it through the
wolffd@0: supplied script "psfrag" (which wraps it in such a tex file).
wolffd@0: 
wolffd@0: psfrag: string [GNE]. This text is passed through latex. 
wolffd@0:   Example: node: a1 [psfrag="$\alpha_1$"]
wolffd@0:            edge: x->y [label="x -> y" psfrag="$x \rightarrow y$"] 
wolffd@0:   The name/label is used only as a guide for positioning, but you better
wolffd@0:   specify them. E.g. if the edge had no label attribute, dot would have to
wolffd@0:   assume that the label is 17 characters wide.
wolffd@0:     The line breaks \l,\n,\r are *not* processed in the psfrag attribute.
wolffd@0:   If you want line breaks, arrange it with latex commands, and *also* specify
wolffd@0:   a label that emulates the breaks.
wolffd@0: tailpsfrag/headpsfrag: string [E]. Same for tail/head of the edge.
wolffd@0: fontname: [GNE] Use any of the commands described in latex2e's fntguide.
wolffd@0:   If the command sequence contains %s, the text is inserted there. Else the
wolffd@0:   text is preceded by the command, all surrounded by braces. For example, if
wolffd@0:   the text is "..." then \texttt{%s} becomes \texttt{...}, and \ttfamily
wolffd@0:   becomes {\ttfamily ...}. 
wolffd@0:     If fontname matches "tt" then dot will use fixed font width for its
wolffd@0:   positioning (is 0.65 right??). If fontname matches "bf" then dot will
wolffd@0:   multiply the width for positioning purposes by ?? (for all families??).
wolffd@0:     You cannot change the font by simply giving a different font name.
wolffd@0:   E.g. to switch to Courier, you either have to use \texttt{%s} with a style
wolffd@0:   that uses Postscript fonts, or else use \fontfamily{pcr}\selectfont ("pcr"
wolffd@0:   stands for postscript courier). As a precaution, dot won't output a fontname
wolffd@0:   that does not contain \.
wolffd@0:     Often used commands are \rmfamily (roman), \sffamily (sans serif),
wolffd@0:   \ttfamily (typewriter), \mdseries (medium, i.e. normal), \bfseries (bold),
wolffd@0:   \upshape (upright, i.e. normal), \itshape (italic), \slshape (slanted),
wolffd@0:   \scshape (small caps); or their equivalents \textrm{%s}, ...; \boldmath;
wolffd@0:   \mathcal{%s}.
wolffd@0: fontsize: "n\cmd". [GNE] Dot assumes for positioning purposes that the font is
wolffd@0:   n points high, and emits the font changing command \cmd to latex. Both n and
wolffd@0:   \cmd are optional.
wolffd@0:     If \cmd is missing then you are informing dot that the latex fontsize is n.
wolffd@0:   *Please* do this at the top level. The default 14 is probably wrong for you.
wolffd@0:   The correct setting for a 10pt article style is "digraph G {fontsize=10 ...}"
wolffd@0:     If you use "n!", dot will force this size to latex by emitting commands
wolffd@0:   \fontsize\selectfont. This is not smart unless you use scalable fonts, eg
wolffd@0:   postscript fonts. 
wolffd@0:     If n is missing and \cmd is one of the standard commands \tiny,
wolffd@0:   \scriptsize, \footnotesize, \normalsize, \large, \Large, \LARGE, \huge or
wolffd@0:   \HUGE, dot will compute the new size automatically. Otherwise you have to
wolffd@0:   specify both.
wolffd@0:     If the command contains %s, the text will be inserted there, else the
wolffd@0:   text is preceded by the command, all surrounded by braces.