<file Taplot par=parfile.taplot | Ta2vplot par=parfile.ta2vplot | Xvpen par=parfile.xvpen
This command reads in the file ``file'', runs the program ``Taplot'' on it using the parameters located in ``parfile.taplot'', passes the result to the program ``Ta2vplot'', and so on. Finally the result goes to Xvpen, which displays the results on the workstation screen. I could have manually edited these parameter files, then executed this same command myself. But to try out some new parameters, I would have to edit the necessary parameter files and run the job over again. With IPE the result appears on the workstation screen, and I am still editing the parameters on their panels. I can immediately try some new values and see how they change the results.