The PST program has a command line interface, as is customary for Unix environments.
The PST program constructs a postscript file that produces a plot of the tree. The program will place the plot on as many pages as needed, including directions for how to cut and paste the pages. One can control the font size, which provides some control over the size of the plot.
To run PST, type:
pst [[-c][-f..][-s..]]* file
The `file' argument must be the name of a file with a .pst extension (but don't type the .pst). Such a file is created by ITI when it is given the -d option.