Specifying print format parameters4-108 Using LCDS Print Description LanguageVFU commandThe VFU command assigns output line numbers to printercarriage control channels. These Line to Channel assignmentsperform the same function as the printer carriage control tape ona conventional line printer.The VFU command also assigns line numbers to the top of theform (TOF parameter) and the bottom of the form (BOFparameter). TOF and BOF are used for prejob page alignmentand for page overflow processing.ac identifier You must specify an identifier of the type ac (at least one alphacharacter required) when defining the VFU table, and reference itin the VFU parameter of the LINE command. The VFU commandmust precede the referencing LINE command.VFU command parametersThe following table summarizes the VFU command parameters.The following sections describe the syntax of the commandparameters and explain the parameter options.VFU ASSIGNSpecifies assignments of channel numbers to output lines.Syntax [ac:] VFU ASSIGN = {(channo, lineno) | (channo, (lineno1 [,lineno2] [, ...]))}Table 4-94. Summary of VFU command parametersParameter Specifies Online Offline DJDEVFU ASSIGN Assigns a VFU channel number to a page linenumber or set of line numbers.Y Y YVFU BOF Bottom Of FormIndicates the number of lines from the top of anoutput page to the last print line on the page; i.e.,defines the last line on which printing appears.Y Y YVFU TOF Top Of FormIndicates the number of lines from the top (asdefined by the PDE BEGIN values) of an output pageto the first print line on the page; in other words,defines the first line on which printing appears.Y Y Y
