To designate a different printer as the default printer:
Go to your home folder and open the file .dtprofile.
Add or edit a line that sets a value for the LPDEST environment variable:
LPDEST=printer_device; export LPDEST
If you are using csh the syntax is:
setenv LPDEST printer_device
This change will take effect the next time you log out and back in again.
For example, the following line would change the default printer to the printer whose device name is laser3d.
LPDEST=laser3d; export LPDEST
If you are using csh the syntax is:
setenv LPDEST laser3d