I haven’t been able to find anything on this topic, so if it has already been covered, please point me in that direction.
I would like to be able to insert images, sticky notes, web links, etc. to the cork board for an individual text file. Is this possible to do or is it something that can be added to a future release?
You might want to think of the Scrivener corkboard as a visual outlining tool, not a note-taker. It connects directly to the files in the Binder.
So sure, you could create sub-documents and add notes or images to them, and those items would appear in the corkboard for the parent file. But depending on what you’re trying to do, you might also want to look at something like Scapple, or even a collaging tool like Curio.