The Zebra printer driver did not properly handle negative "label top" values

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  PPD compiler documentation for CUPS.

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<h1 class='title'>Introduction to the PPD Compiler</h1>

<P>This document describes how to use the CUPS PostScript Printer Description
(PPD) file compiler. The PPD compiler generates PPD files from simple text files
that describe the features and capabilities of one or more printers.</P>

<BLOCKQUOTE><B>Note:</B>

<P>The PPD compiler and related tools are deprecated and will be removed in a future release of CUPS.</P>

</BLOCKQUOTE>

<div class='summary'><table summary='General Information'>
<tbody>
<tr>
	<th>See Also</th>
	<td>Programming: <a href='raster-driver.html'>Developing Raster Printer Drivers</a><br>
	Programming: <a href='postscript-driver.html'>Developing PostScript Printer Drivers</a><br>
	Programming: <a href='api-filter.html'>Filter and Backend Programming</a><br>
	Programming: <a href='api-raster.html'>Raster API</a><br>
	References: <a href='ref-ppdcfile.html'>PPD Compiler Driver Information File Reference</a><br>
	Specifications: <a href='spec-ppd.html'>CUPS PPD Extensions</a></td>
</tr>
</tbody>
</table></div>