Adobe InDesign CS6 added a great feature to help designers quickly located missing or edited images and other placed objects without the need to visit the Links panel.
When you’re working in a document and an image or placed graphic is missing or has been edited but not updated, InDesign places a small colored badge at the top of the object to indicate its status. In the case of my missing logo in the screenshot, InDesign has placed the red alert badge on the object box.
This method of badging is handy because most designers probably don’t think about the status of their placed objects until the project is finished. If an object has changed enough, it can mess-up the overall layout. With these new badges, you can see problems on the fly with no interaction necessary.