[Update REQ 5262]:

["Tamara Munzner" <munzner>]

>Is there any commands to control the rotation (or translation etc.)
>step by step, in other words ao that everytime I push some button 
>the object rotates only some degree (e.g., 10 degree).  

Also, if you have the SGI version of Geomview, there's an external
module called "Transformer" that lets you do this easily.

Tamara Munzner		The Geometry Center	     ((555) 555-5555
munzner at geom.umn.edu    http://www.geom.umn.edu/people/munzner.html