Mark which photo attachments have been inserted(or not)

I find myself cleaning up threads from other people who have forgotten to insert some of their photos. When there are 20+ photos in a thread, its pretty cumbersome trying to identify which attachment it is. If there could be an easier way to identify which attachments these are without comparing ID numbers of every single attachment, this would make things much easier. Or perhaps even a notice when you submit a thread, that some attachments are not inserted.
That looks nice, however it doesn't help when you are trying to caption the photos and are looking for a specific photo. For example, sometimes a photo is uploaded twice, deleting the wrong photo breaks the attachment.