WebSite-Watcher can optionally put highlight-borders around changed images.
How are changed images detected?
That's dependent from the image configuration. WebSite-Watcher supports three different configurations to download or images:
Download all images
If an update is detected, then WebSite-Watcher downloads all images immediately and save them to your hard disk. With that option WebSite-Watcher will use the image content to determine if an image has been changed. This is the most reliable method to put highlight-borders around changed images.
Use absolute image addresses
With that setting, WebSite-Watcher downloads only the html page and loads the images from their server as soon as you open the page in your browser. If you use absolute image addresses, then WebSite-Watcher will compare the filenames of the images to determine, if they have been changed or not.
Display grey boxes instead of images
It's the fastest method to check and open pages, but you will see grey boxes instead of the images when you open a page in your browser. With that option WebSite-Watcher is not able to highlight images.
Please note, that a web page is only marked as changed, when a textual change in a page has been detected, and not when only an image has been changed!
If you want to watch a concrete image, you can put the image address into the bookmark's URL field.