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Header Watermark provides you with extra flexibility and control over the header image(s) for your WordPress site:
<ul>
<li>Use any image from your Media Library as a watermark for your header image(s)</li>
<li>Control the placement and opacity of the watermark</li>
<li>Select any suitable image from your Media Library as your header image(s)</li>
<li>Control which images are used for random header images</li>
</ul>
<h3>Requirements</h3>
Header Watermark requires the following to work:
<ul>
<li>GD Library PHP extension – version 2.0.28 or higher</li>
<li>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</li>
</ul>
<h3>Themes</h3>
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:
<blockquote>
Notice: Constant HEADER_IMAGE already defined in /var/www/yoursite/wordpress/wp-content/themes/twentyeleven/functions.php on line 118
</blockquote>
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.

Header Watermark

Add a watermark image to your WordPress header image and use suitable images from your media library as the header image(s).

MantraBrain

Ultimate Watermark is the most comprehensive WordPress image watermarking plugin available. This professional-grade solution automatically adds watermarks to images as they are uploaded to your WordPress media library, protecting your valuable content from unauthorized use.
🔒 Protect Your Images with Professional Watermarking
Built with both GD and ImageMagick support, Ultimate Watermark offers enterprise-level watermarking capabilities with extensive customization options. Whether you’re a photographer protecting your portfolio, an e-commerce store branding product images, or a content creator safeguarding your work, this plugin provides the tools you need.
🎯 Perfect for: 
* Professional photographers and studios 
* E-commerce websites and online stores 
* Content creators and bloggers 
* Corporate websites and portfolios 
* Digital artists and designers 
* Media companies and publishers
<h4>🎯 Key Features & Benefits</h4>
🖼️ Advanced Image Watermarking System 
* Automatic Watermark Application – Watermarks are applied instantly when images are uploaded 
* Bulk Watermark Operations – Process existing images in your media library with bulk actions 
* Frontend Watermarking – Support for user-uploaded images on the frontend 
* Multi-Size Targeting – Watermark specific image sizes (thumbnail, medium, large, custom) 
* Custom Post Type Support – Apply watermarks only to specific post types
⚙️ Professional Configuration Options 
* Watermark Image Management – Upload and manage multiple watermark images 
* Flexible Size Control – Choose from Original size, Custom dimensions, or Scaled percentage (1-100%) 
* Transparency Control – Adjust opacity from 0% (invisible) to 100% (fully visible) 
* Quality Optimization – Configure output image quality (1-100%) for optimal file sizes 
* Format Selection – Choose between Baseline or Progressive JPEG for better compatibility
📍 Precise Watermark Positioning 
* 9-Position Grid System – Top/Middle/Bottom × Left/Center/Right alignment options 
* Advanced Offset Controls – X and Y positioning with pixel or percentage units 
* Professional Results – Pixel-perfect positioning for brand consistency
🛡️ Comprehensive Image Protection 
* Right-Click Disable – Prevent image downloading through right-click 
* Drag & Drop Prevention – Stop users from dragging images to their desktop 
* User-Level Protection – Optional protection settings for logged-in users 
* Enhanced Security – Multiple layers of image protection
💾 Smart Backup & Recovery System 
* Automatic Backup Creation – Original images are safely backed up before watermarking 
* Configurable Backup Quality – Set backup image quality to balance file size and preservation 
* Safe Watermark Removal – Restore original images by removing watermarks 
* Data Integrity – Maintain image quality and metadata throughout the process
🔧 Technical Excellence & Performance 
* Dual Library Support – Works with both GD and ImageMagick for maximum compatibility 
* Metadata Preservation – Maintains EXIF and IPTC data for professional workflows 
* Memory Optimization – Efficient processing for large image libraries 
* WordPress 6.4 Ready – Fully compatible with the latest WordPress version 
* GPLv3 License – Open source with WordPress compatibility
<h4>🚀 Quick Setup</h4>
<ol>
<li>Install & Activate the plugin</li>
<li>Upload Watermark Image in Watermark Image settings</li>
<li>Enable Automatic Watermarking in General Settings</li>
<li>Select Target Image Sizes (avoid full size unless necessary)</li>
<li>Configure Position & Settings as needed</li>
</ol>
<h4>📋 Detailed Features</h4>
General Settings 
* Toggle automatic watermarking for new uploads 
* Enable manual watermarking for media library 
* Select specific image sizes for watermarking 
* Target custom post types 
* Enable frontend watermarking
Watermark Image Settings 
* Upload and manage watermark images 
* Size control: Original, Custom (X/Y pixels), or Scaled (1-100%) 
* Transparency adjustment (0-100%) 
* Output quality control (1-100%) 
* Image format selection (Baseline/Progressive)
Position Settings 
* 9-position alignment grid 
* X and Y offset values 
* Offset units (pixels or percentages) 
* Precise positioning control
Protection & Backup 
* Right-click disable option 
* Drag and drop prevention 
* Logged-in user protection toggle 
* Automatic backup creation 
* Backup quality settings
<h4>🎨 Use Cases</h4>
<ul>
<li>Photography Websites: Protect professional images</li>
<li>E-commerce: Brand product images</li>
<li>Portfolio Sites: Add copyright protection</li>
<li>Blogs: Prevent image theft</li>
<li>Corporate Sites: Maintain brand consistency</li>
</ul>
<h4>🔧 Technical Requirements</h4>
<ul>
<li>WordPress 5.0 or higher</li>
<li>PHP GD extension OR ImageMagick</li>
<li>Sufficient server memory for image processing</li>
<li>Write permissions for upload directory</li>
</ul>

Ultimate Watermark – Advanced Image Watermarking

Automatically add professional watermarks to your images with advanced positioning, protection features, and backup capabilities.

Header Watermark vs Ultimate Watermark – Advanced Image Watermarking