Your default printer, for example, is defined by the environment
variable PRINTER (for information on the available printers and
their names and characteristics, see the WWW entry for printing; from the CERN
Computing Home Page (URL - http://www.cern.ch/CERN/Computing.html),
select in turn -- UNIX Workstation Support --> Springer -->
List of Registered Printers; WWW is described in Section 
).
To change the default value of PRINTER, enter
the command
setenv PRINTER printer-name C shell family
PRINTER= printername; export PRINTER
Bourne shell family
If the value you wish to assign to a variable contains blanks, enclose the
string in quotes (``).