A sample PDF template showing off the text and image watermarks. Note: you will need to save an image called `gravityformspdfextended.jpg` to `images`.

example-watermark.php

<?php

/**
 * Template Name: Example Watermarks
 * Version: 0.1
 * Description: A sample PDF template showing off the text and image watermarks
 * Author: Gravity PDF
 * Group: Example
 * License: GPLv2
 * Required PDF Version: 4.0
 */

/* Prevent direct access to the template (always good to include this) */
if ( ! class_exists( 'GFForms' ) ) {
	return;
}

?>

<!-- Basic Text Watermark -->
<watermarktext content="PRIVATE" />

<pagebreak />

<!-- Text Watermark with alpha transparency -->
<watermarktext content="PRIVATE" alpha="0.1" />

<pagebreak />

<!-- Text Watermark with special characters -->
<watermarktext content="<?php echo htmlspecialchars( '<CONFIDENTIAL>', ENT_QUOTES ); ?>" />

<pagebreak />

<!-- Disable Text Watermark -->
<watermarktext content="" />

<pagebreak />

<!-- Basic Image Watermark -->
<watermarkimage src="<?= __DIR__ ?>/images/gravityformspdfextended.jpg" />

<pagebreak />

<!-- Image watermark with 50% transparency -->
<watermarkimage src="<?= __DIR__ ?>/images/gravityformspdfextended.jpg" alpha="0.5" />

<pagebreak />

<!-- Image watermark resized to fit the full page -->
<watermarkimage src="<?= __DIR__ ?>/images/gravityformspdfextended.jpg" size="P" />

<pagebreak />

<!-- Image watermark with default size positioned 10mm x 10mm from the top left corner -->
<watermarkimage src="<?= __DIR__ ?>/images/gravityformspdfextended.jpg" position="10,10" />

<pagebreak />

<!-- Image watermark resized to 50x50mm image -->
<watermarkimage src="<?= __DIR__ ?>/images/gravityformspdfextended.jpg" size="50,50" />

<pagebreak />

<!-- Disable image watermark -->
<watermarkimage src="" />