Xerox 701P21091 - Manual (Page 348)

Specifying print format parameters
4-108 Using LCDS Print Description Language
VFU command
The VFU command assigns output line numbers to printer
carriage control channels. These Line to Channel assignments
perform the same function as the printer carriage control tape on
a conventional line printer.
The VFU command also assigns line numbers to the top of the
form (TOF parameter) and the bottom of the form (BOF
parameter). TOF and BOF are used for prejob page alignment
and for page overflow processing.
ac identifier You must specify an identifier of the type ac (at least one alpha
character required) when defining the VFU table, and reference it
in the VFU parameter of the LINE command. The VFU command
must precede the referencing LINE command.
VFU command parameters
The following table summarizes the VFU command parameters.
The following sections describe the syntax of the command
parameters and explain the parameter options.
VFU ASSIGN
Specifies assignments of channel numbers to output lines.
Syntax [ac:] VFU ASSIGN = {(channo, lineno) | (channo, (lineno
1
[,
lineno
2
] [, ...]))}
Table 4-94. Summary of VFU command parameters
Parameter Specifies Online Offline DJDE
VFU ASSIGN Assigns a VFU channel number to a page line
number or set of line numbers. Y Y Y
VFU BOF Bottom Of Form
Indicates the number of lines from the top of an
output page to the last print line on the page; i.e.,
defines the last line on which printing appears. Y Y Y
VFU TOF Top Of Form
Indicates the number of lines from the top (as
defined by the PDE BEGIN values) of an output page
to the first print line on the page; in other words,
defines the first line on which printing appears. Y Y Y