Tools Menu
    You can add up to 3 external programs, as SciLab for instance.
In order to do it, you have to click on this menu Tools an choose Tools again as the sub menu. A dialog box opens and you are asked to put the name you want for this external program, and to put the complete path to load it.
    Once this is done, go back to the menu Tools and click on the name of your program. Before loading it, you are asked for writing an argument if your program needs it. Then you enter in your program.
    At the end, if you want to insert picture or diagram, dont forget to export them in *.eps if you translate your document in Postscript or in *.pdf if you translate it in PDF.