The online manual explains what the program can do.
For a series of demos do the following:
Type: cd /sgi/group/xmgr-3.01/examples
Type: dotest
This launches xmgr with an interactive session. When you exit from this session another interactive session is launched which explains the next topic. This goes on for quite a while. Kind of winky but it gives you the flavor of the menus.
Paul J. Turner Center for Coastal and Land-Margin Research Oregon Graduate Institute of Science and Technology Beaverton, Oregon