Here's more information about using the LaTeX Equation package.

I assume that you have downloaded the LaTeX Equation package from the
<URL:http://bourbon.cs.columbia.edu:8001/tgif/goodies.html> page.
If you untar the package in your working directory, you should get
the following 3 files:

    README.latex
    eq.sym
    simple.tex

When you run tgif from your working directory and select Instantiate()
from the Special Menu (or just type <Cntrl>i), you should see "eq.sym"
in the list.  Just double-click on "eq.sym" and place it down anywhere
in the drawing area.  You should see:

    eq=
    \LARGE
    \[
       E\,=\,M\,C^2
    \]

on the screen.  If you hold down the <Shift> key and click on the
equation with the middle mouse button (<Btn2>), you will get an
error:

    Can not open '/u/tangram/lib/tgif/latex/simple.tex' for read.

You should then following the instructions in README.latex to
modify "eq.sym" for it to work in your environment.  Once you
set it up correctly, you don't need to touch it again.  One thing
not mentioned in the README.latex file is that you can use the
Domain concept to make things a little easier.  Please try the
following.  Say that your home directory is "/home/you".  Create
"/home/you/lib/tgif/latex" and copy "README.latex", "eq.sym" and
"simple.tex" into that directory.  Change your working directory to
that directory and follow the instructions in README.latex to do
the modification.

Add the following lines in your X resource file (probably
"/home/you/.Xdefaults"):

    Tgif.MaxDomains:	1
    Tgif.DefaultDomain:	0
    Tgif.DomainPath0:	LaTeX:.:/home/your/lib/tgif/latex

When you start tgif now, you will see that on the left top corner,
it says LaTeX (meaning "LaTeX" is your current "Domain").  If you
do <Cntrl>i, all *.sym file in either th current directory or
"/home/your/lib/tgif/latex" will be shown in the list.  So you can
use the equation object no matter where you working directory is.
The man pages has explanations on how Domain works.

If you run into any problems, please feel free to send me e-mail.
--
Bill Cheng // Guest at Columbia University Computer Science Department
william@cs.columbia.edu <URL:http://www.cs.columbia.edu/~william>
