This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Header Watermark


Header Watermark provides you with extra flexibility and control over the header image(s) for your WordPress site:

  • Use any image from your Media Library as a watermark for your header image(s)
  • Control the placement and opacity of the watermark
  • Select any suitable image from your Media Library as your header image(s)
  • Control which images are used for random header images


Header Watermark requires the following to work:

  • GD Library PHP extension – version 2.0.28 or higher
  • The WordPress theme must use the get_header_image() function to generate the header image and must also define the HEADER_IMAGE_WIDTH and HEADER_IMAGE_HEIGHT constants


This plugin works with the Twenty Ten theme with no further configuration.

If you use this plugin with the Twenty Eleven theme, you may see a notice at the top of your website/WordPress admin pages like this:

Notice: Constant HEADER_IMAGE already defined in /var/www/yoursite/wordpress/wp-content/themes/twentyeleven/functions.php on line 118

You may also find that you get occasional errors on some WordPress admin pages, for example if you activate a different theme.

To prevent the notice and errors, find and change the following line in the functions.php file of the Twenty Eleven theme:

Change this:
define( ‘HEADER_IMAGE’, ” );
to this:
if ( ! defined( ‘HEADER_IMAGE’ ) ) {
define( ‘HEADER_IMAGE’, ” );

Any other themes that define the HEADER_IMAGE constant may have the same problems and need to be altered in the same way for the plugin to work.


  • Administration interface


  1. Install Header Watermark either via the plugin directory, or upload the header-watermark directory to the /wp-content/plugins/ directory
  2. Activate the plugin through the Plugins menu in WordPress
  3. Select the Header Watermark item in the Appearance menu to configure the plugin


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Contributors & Developers

“Header Watermark” is open source software. The following people have contributed to this plugin.


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  • Fixed a bug caused by wrong plugin directory reference.