optional but semicolons are retained to distinguish margin from page length.
DEVICE: ;P-DEC if the home device is a video terminal, output
would scroll without waiting for the user to
enter return after a screen display.
DEVICE: ;132 to use the home device, right margin of 132.
DEVICE: ;;66 to use the home device, page length of 66 lines.
To scroll on the home device, use ;;9999.
The general syntax for responding to the device prompt is as follows:
When sending output to the [SPOOLER], the spool document may also be named.
DEVICE: Device Name ; Subtype ; Right Margin ; Page Length
If the subtype is not specified, characteristics are taken from the Device
file. If a subtype is specified without a device name, characteristics are
taken from the Terminal Type file. Note that the second piece is optional
and may be omitted, semicolon and all. The third and fourth pieces are also