Kay Joe

Important Aspects
<ul>
<li>The default featured image will show exactly how your theme shows it. That is if it appears besides the excerpt it will show there. It will not show on top of the excerpt or misaligned, as this plugin only changes the image and does not add any html attributes.</li>
<li>This simple plugin sets an image that has been already uploaded in the WordPress Media Library as the default Featured Image for all posts that do not have a featured image already set.</li>
<li>This plugin can also remove or unset an image that exists in media library and is set as featured image for one or more posts. This is the remove default featured image feature.</li>
<li>Your theme must already support post thumbnails for this plugin to work. This plugin will show the default featured image you set in same style and position as shown by your active theme. Only the image will be changed</li>
<li>If you are using a cache plugin, try disabling it and clear browser cache to see results. You can always go to a post and see whether the featured image has been set or unset.</li>
<li>Please deactivate any other featured image plugin before using this plugin. Also, if you have modified the code in your theme files to show a default featured image then please delete that code, else plugin will have problems</li>
<li>The following steps are recommended but not necessary.These may be required to set the size for the default featured image.
<ul>
<li>To Set a default featured image for a post, check the size of the featured image that your theme is showing. This can be dome by right click on the image->Choose view Image OR copy its link or address and open in new browser. Right click on the image and see its dimensions in image information.</li>
<li>If your theme’s functions.php file uses the add_image_size function and the size of the image uploaded to media library to be used as default featured image, is higher than the max size set for thumbnail by any of the _add_image_size_then the selected image to be set as default image will be resized and saved as a new image with size as the maximum size set to be used as thumbnail (not single post) by those functions.</li>
<li>It is recommended that the Settings of the small thumbnail in the Settings-Media and the size set by add_image size be kept same
<ul>
<li>After that please resize the image to be set as default featured to the smaller size (to optimize page load time) or resized exactly as the dimensions of smallest size in Settings->Media as set by the add_image_size function</li>
<li>Then uploaded the image to the media library and set it as default featured image using this plugin</li>
</ul>
</li>
</ul>
</li>
</ul>
<h4>Suggestions are welcome</h4>
<ul>
<li>Found a bug?</li>
<li>Something to be improved?</li>
</ul>
Contact me @kayjoe on WordPress.org or ano[dot]shani[at]gmail[dot]com

Default Featured Image Themed

Set an uploaded image as a default featured image for all posts without a featured image. Remove an image set as featured image for one or more posts.

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.

Default Featured Image Themed vs Ultimate Watermark – Advanced Image Watermarking