Parameter

display-device

   Refers to the display-device parameter specified with the SET
   DISPLAY command. If you are directing application output to
   multiple workstations in the same session, you can use logical
   names to point to each workstation. Using the SHOW DISPLAY
   command, you can specify this logical name as the display-device
   parameter to see where application output will be displayed.

   If you do not specify a display-device string, the logical name
   DECW$DISPLAY is used.